IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: A tap can fill a tank in 6 hours. After half the tank is filled three more similar taps are opened. What is the total time taken to fill the tank completely ? 1130 0

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    4 hrs 15 min
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  • 2
    3 hrs 24 min
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  • 3
    4 hrs 51 min
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  • 4
    3 hrs 45 min
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उत्तर : 4. "3 hrs 45 min"
व्याख्या :

Answer: D) 3 hrs 45 min Explanation: Time taken by one tap to fill half of the tank = 3 hrs. Part filled by the taps in 1 hour = 4 x 1/6 = 2/3 Remaining part = 1 - 1/2 = 1/2 2/3 : 1/2 :: 1 : p p = 1/2 x 1 x 3/2 = 3/4 hrs. i.e., 45 min So, total time taken = 3 hrs 45 min.

प्र: What is the 2017 theme of International Day for Biodiversity (IDB)  ? 1129 0

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    B)  ? A)
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    ? A) Biodiversity and Sustainable Tourism B) Invasive Alien Species
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    Biodiversity and Agriculture
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  • 4
    Convention on Biological Diversity
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उत्तर : 1. "B)  ? A)"
व्याख्या :

Answer: A) Biodiversity and Sustainable Tourism Explanation: The International Day for Biological Diversity (IDB) is observed every year on May 22 to increase understanding and awareness of biodiversity issues. The 2017 theme “Biodiversity and Sustainable Tourism” provides an opportunity to raise awareness and action towards the important contribution of sustainable tourism both to economic growth and to the conservation and sustainable use of biodiversity.

प्र: Everyone has it and no one can lose it. What is it? 1128 0

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    Face
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    Teeth
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    Hair
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  • 4
    Shadow
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उत्तर : 4. "Shadow"
व्याख्या :

Answer: D) Shadow Explanation:

प्र: 3 divided by 1/3? 1125 0

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    1
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  • 2
    0
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  • 3
    9
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  • 4
    None
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उत्तर : 3. "9"
व्याख्या :

Answer: C) 9 Explanation: 3 divided by 1/3 => 313 = 3 x 3/1  = 9

प्र: Excise duty is a tax levied on the 1122 0

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    Export of goods
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    Import of goods
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    sale of goods
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  • 4
    Production of goods
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उत्तर : 4. "Production of goods"
व्याख्या :

Answer: D) Production of goods Explanation: An excise or excise tax or excise duty is a type of tax charged on goods produced within the country (as opposed to customs duties, charged on goods from outside the country). It is a tax on the production of a good. This tax is now known as the Central Value Added Tax (CENVAT).

प्र: A man has only 20-paise and 25-paise coins in a bag. If he has 50 coins in all totaling to Rs.10.25, then the number of 20-paise coins is 1121 0

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    42
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    45
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    38
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  • 4
    36
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उत्तर : 2. "45"
व्याख्या :

Answer: B) 45 Explanation: Let number of 20 ps coins = x and number of 25 ps coins = y Given total coins in the bag = 50 x + y = 50.......(1) But the total money in the bag = Rs. 10.25 0.20x + 0.25y = 10.25 20x + 25y = 1025.........(2) Now multiplying (1) by 25 we get 25x+25y=1250.............(3) By solving (2) and (3) 20x + 25y = 1025; => x = 45; Then, the no. of 20 ps coins are 45.

प्र: Two trains running in opposite directions cross a pole placed on the platform in 47 seconds and 31 seconds respectively. If they cross each other in 33 seconds, what is the ratio of their speeds? 1121 0

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    1:7
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  • 2
    7:1
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  • 3
    2:3
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  • 4
    3:2
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उत्तर : 1. "1:7"
व्याख्या :

Answer: A) 1:7 Explanation: Let the speed of the trains be x and y respectively length of train1 = 47xlength of train2 = 31yRelative speed= x + yTime taken to cross each other = 33 s=> 47x+31yx+y= 33=> (47x + 31 y) = 33(x + y)=> 14x = 2y=> x/y = 2/14 = 1/7  = 1:7

प्र: What is 16 bit? 1121 0

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उत्तर :
व्याख्या :

Anything larger and the computer would need to break the number into smaller pieces.   16-bit is a computer hardware device or software program capable of transferring 16 bits of data at a time. Today, 16-bit hardware and software has been replaced by 32-bit and 64-bit alternatives, which give the computer more memory to work with; increasing overall performance.   For example, early computer processors (e.g., 8088 and 80286) were 16-bit processors, meaning they were capable of working with 16-bit binary numbers (decimal number up to 65,535).

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