IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: What do lines of latitude measure? 1377 0

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    east-west position between the poles
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    north-south position between the poles
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    north-east position between the poles
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    south-west position between the poles
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उत्तर : 2. "north-south position between the poles"
व्याख्या :

Answer: B) north-south position between the poles Explanation: Lines of latitude measure north-south position between the poles.   Lines of latitude are imaginary reference lines that describe how far north or south a location on the Earth is from the Equator. The equator is defined as 0 degrees, the North Pole is 90 degrees north, and the South Pole is 90 degrees south. Lines of latitude are all parallel to each other, thus they are often referred to as parallels.

प्र: In a triangle ABC, angle 'a' is the smallest one & A+7B = 112. Find the range of value 'c' ? 1377 0

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    138 to 164
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    125 to 147
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    148 to 158
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    152 to 164
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उत्तर : 4. "152 to 164"
व्याख्या :

Answer: D) 152 to 164 Explanation: A+7B=112 it is clear that A = 14, then it becomes A>=B, but A is smallest angle) givenso, range of A is 0.0001 to 13.9999 ( I am taking upto 4 decimal places)so, range of B becomes 14 to 16 ( after rounding off to 4 decimal places)so, range of C becomes 152 to 164 ( after rounding off to 4 decimal places)

प्र: Name the Asian country that has 1st time turned around from a Net importer of electricity to Net Exporter of electricity, as per Central Electricity Authority of the country. 1377 0

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    India
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    Bangladesh
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    Myanmar
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    Pakistan
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उत्तर : 1. "India"
व्याख्या :

Answer: A) India Explanation: As per Central Electricity Authority, the Designated Authority of Government of India for Cross Border Trade of Electricity, 1st time 'India' has turned around from a net importer of electricity to Net Exporter of electricity.

प्र: How many weekends in a year? 1377 0

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    52
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    53
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    103
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    104
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उत्तर : 4. "104"
व्याख्या :

Answer: D) 104 Explanation: In normal we have 104 Weekend Days. We know that a Each normal year has 365 days or 52 weeks plus one day, and each week has two weekend days, which means there are approximately 104 weekend days each year. Whereas in a leap year we have 366 days it adds one more day to the year. And what makes the change is the starting day of the year.

प्र: Name the player who became the first Indian javelin thrower to claim a gold medal at the Commonwealth Games 2018. 1376 0

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    Neeraj Chopra
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    Ankur Mittal
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    Seema Antil
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    Annu Rani
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उत्तर : 1. "Neeraj Chopra"
व्याख्या :

Answer: A) Neeraj Chopra Explanation: Neeraj Chopra became the first Indian javelin thrower to claim a gold medal at the Commonwealth Games, with a season’s best effort of 86.47m in the final. The 20-year-old junior world champion had made the final after achieving the qualifying mark in his very first throw.

प्र: If K earns 12% less than L, then how much percent more does L earn than K ? 1375 0

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    13.96%
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    13.63%
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    13.56%
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    14.01%
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उत्तर : 2. "13.63%"
व्याख्या :

Answer: B) 13.63% Explanation: Required % is given by    => 12100-12x100   = 1200/88   = 13.636%

प्र: In what time a 360 m. long train moving at the speed of 44 km/hr will cross a 140 m. long bridge ? 1375 0

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    36 sec
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    39 sec
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    41 sec
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    43 sec
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उत्तर : 3. "41 sec"
व्याख्या :

Answer: C) 41 sec Explanation: Speed = 44 kmph x 5/18 = 110/9 m/s We know that, Time = distance/speed Time = (360 + 140) / (110/9) = 500 x 9/110 = 41 sec.

प्र: The sum of three numbers is 98. If the ratio of the first to the second is 2:3. And that of the second to the third is 5:8, then the second number is: 1375 0

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    30
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    27
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    23
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    33
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उत्तर : 1. "30"
व्याख्या :

Answer: A) 30 Explanation: Then, A:B = 2:3 and B:C = 5:8= (5 x 3/5) : (8 x 3/5) = 3:24/5A:B:C = 2:3:24/5= 10:15:24 => B = 98 x 15/49 = 30.

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