प्रश्न और उत्तर का अभ्यास करें

प्र:

निम्नलिखित विकल्पों में से वह शब्द चुनिए जो दिए गए अक्षरों का प्रयोग करके नहीं बनाया जा सकता।

CAPABILITIES

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    CABLE
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    PLATE
    सही
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  • 3
    PALATE
    सही
    गलत
  • 4
    PAYABLE
    सही
    गलत
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उत्तर : 4. "PAYABLE"

प्र: A train travelling at 48 kmph crosses another train, having half its length and travelling in opposite direction at 42 kmph, in 12 sec. It also covers a bridge in 45 sec. Find the length of the bridge ? 1205 0

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    250 mts
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    400 mts
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    320 mts
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  • 4
    390 mts
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उत्तर : 2. "400 mts"
व्याख्या :

Answer: B) 400 mts Explanation: Let the length of the 1st train = L mts Speed of 1st train = 48 kmph Now the length of the 2nd train = L/2 mts Speed of 2nd train = 42 kmph Let the length of the bridge = D mts Distance = L + L/2 = 3L/2 Relative speed = 48 + 42 = 90 kmph = 90 x 5/18 = 25 m/s(opposite) Time = 12 sec => 3L/2x25 = 12 => L = 200 mts Now it covers the bridge in 45 sec => distance = D + 200 Time = 45 sec Speed = 48 x5/18 = 40/3 m/s => D + 200/(40/3) = 45 => D = 600 - 200 = 400 mts Hence, the length of the bridge = 400 mts.

प्र:

राजस्थान मे मीनाकारी का सर्वोतम कार्य किया जाता है ?

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    जयपुर मे
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    उदयपुर में
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    प्रतापगढ में
    सही
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  • 4
    बूंदी में
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उत्तर : 1. "जयपुर मे "

प्र:

प्राथमिक स्तर पर विद्यार्थियों के गणित अधिगम का मूल्यांकन करने के लिए निम्नलिखित में से कौन सी प्रभावशाली योजना नहीं है?

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    ऐसे कार्यों की अभिकल्पना की जाए कि यवत् रटने और संकल्पना समझ में अन्तर किया जा सके।
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  • 2
    विद्यार्थियों की त्रुटियों को जानकर उनके तर्क का विश्लेषण किया जाए।
    सही
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  • 3
    ऐसे कार्यों की अभिकल्पना की जाए जिनमें एक से अधिक स्तर के उत्तर प्राप्त हो सकते हैं।
    सही
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  • 4
    मुख्यतः समूह संचालित कार्यों का प्रयोग किया जाए।
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उत्तर : 4. "मुख्यतः समूह संचालित कार्यों का प्रयोग किया जाए।"

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उत्तर : 2. "6060"

प्र: Find the Missing Numbers in the given Number Puzzle ? 1205 0

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    169 & 81
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    67 & 121
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    64 & 115
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    70 & 110
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उत्तर : 1. "169 & 81"
व्याख्या :

Answer: A) 169 & 81 Explanation: Observe that in each column, square of sum of digits in the first row = Respective second row elements.   In the same way, square of sum of digits in the second row = Respective third row elements.   => 6+42=102=100   => 4+92=132=169   => 8+12=92=81.

प्र:

Directions: Read the following passage carefully and answer the questions given below it. Certain words/phrases have been printed in bold to help you locate them while answering some of the questions.
 A new analysis has determined that the threat of global warming can still be greatly diminished if nations cut emissions of heat-trapping greenhouse gases by 70% this century. The analysis was done by scientists at the National Center for Atmospheric Research (NCAR). While global temperatures would rise, the most dangerous potential aspects of climate change, including massive losses of Arctic sea ice and permafrost and significant sea-level rise, could be partially avoided.
 “This research indicates that we can no longer avoid significant warming during this century,” said NCAR scientist Warren Washington, the study paper's lead author. “But, if the world were to implement this level of emission cuts, we could stabilize the threat of climate change", he added.
 Average global temperatures have warmed by close to 1 degree Celsius since the pre-industrial era. Much of the warming is due to human-produced emissions of greenhouse gases, predominantly carbon dioxide. This heat-trapping gas has increased from a pre-industrial level of about 284 parts per million ( ppm ) in the atmosphere to more than 380 ppm today. With research showing that additional warming of about 1 degree C may be the threshold for dangerous – climate change, the European Union has called for dramatic cuts in emissions of carbon dioxide and other greenhouse gases.
 To examine the impact of such cuts on the world's climate, Washing ton and his colleagues ran a series of global studies with the NCAR - based Community Climate System Model (CCSM). They assumed that carbon dioxide levels could be held to 450 ppm at the end of this century. In contrast, emissions are now on track to reach about 750 ppm by 2100 if unchecked. The team's results showed that if carbon dioxide were held to 450 ppm, global temperatures would increase by 0.6 degrees Celsius above current readings by the end of the century. In contrast, the study showed that temperatures would rise by almost four times that amount to 2.2 degrees Celsius above current readings if emissions were allowed to continue on their present course. Holding carbon dioxide levels to 450 ppm would have other impacts, according to the climate modeling study.
 Sea-level rise due to thermal expansion as water temperatures warmed would be 14 centimeters about (5.5 inches) instead of 22 centimeters (8.7 inches). Also, Arctic ice in the summertime would shrink by about a quarter in volume and stabilize by 2100, as opposed to shrinking at least three quarters and continuing to melt, and Arctic warming would be reduced by almost half.

Direction: Choose the word which is most opposite in meaning to the word printed in bold as used in the passage.
Q. Diminished 

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    Created
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    rose
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    increased
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    lessen
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  • 5
    finished
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उत्तर : 3. "increased "
व्याख्या :

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