IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: How many degrees will the minute hand move, in the same time in which the second hand move 4800 ? 6076 05b5cc6d8e4d2b4197774e746
5b5cc6d8e4d2b4197774e746- 180 degtrue
- 2160 degfalse
- 3140 degfalse
- 4135 degfalse
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उत्तर : 1. "80 deg"
व्याख्या :
Answer: A) 80 deg Explanation: As minute hand covers, 60 degrees Minute hand covers 4800/60 = 80°
प्र: P alone can complete a piece of work in 6 days. Work done by Q alone in one day is equal to one-third of the work done by P alone in one day. In how many days can the work be completed if P and Q work together ? 2736 05b5cc6d8e4d2b4197774e737
5b5cc6d8e4d2b4197774e737- 15 (2/3)false
- 26 (3/4 )false
- 34 (1/2)true
- 43false
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उत्तर : 3. "4 (1/2)"
व्याख्या :
Answer: C) 4 (1/2) Explanation: Work done by P alone in one day = 1/6th of the total work done by Q alone in one day = 1/3(of that done by P in one day) = 1/3(1/6 of the total) = 1/18 of the total. Work done by P and Q, working together in one day = 1/6 + 1/18 = 4/18 = 2/9 They would take 9/2 days = 4 (1/2) days to complete the work working together.
प्र: If a trader sold two cars each at Rs. 404415 and gains 15% on the first and loses 15% on the second, then his profit or loss percent on the whole is ? 1860 05b5cc6d8e4d2b4197774e732
5b5cc6d8e4d2b4197774e732- 11.44 %false
- 22.02 %false
- 31.04 %false
- 42.25 %true
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उत्तर : 4. "2.25 %"
व्याख्या :
Answer: D) 2.25 % Explanation: SP of each car is Rs. 404415, he gains 15% on first car and losses 15% on second car. In this case, there will be loss and percentage of loss is given by = [(profit%)(loss%)]/100 = (15)(15)/100 % = 2.25%
प्र: A man can row 6 kmph in still water. When the river is running at 1.2 kmph, it takes him 1 hour to row to a place and back. What is the total distance traveled by the man ? 2241 05b5cc6d7e4d2b4197774e728
5b5cc6d7e4d2b4197774e728- 14.58 kmsfalse
- 26.35 kmsfalse
- 35.76 kmstrue
- 45.24 kmsfalse
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उत्तर : 3. "5.76 kms"
व्याख्या :
Answer: C) 5.76 kms Explanation: Speed in still water = 6 kmph Stream speed = 1.2 kmph Down stream = 7.2 kmph Up Stream = 4.8 kmph x/7.2 + x/4.8 = 1 x = 2.88 Total Distance = 2.88 x 2 = 5.76 kms
प्र: What is the feminine of bull ? 2013 05b5cc6d7e4d2b4197774e723
5b5cc6d7e4d2b4197774e723- 1Mulefalse
- 2Ostrichfalse
- 3Tigressfalse
- 4Heifertrue
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उत्तर : 4. "Heifer"
व्याख्या :
Answer: D) Heifer Explanation:
प्र: Water soluble vitamin include 2182 05b5cc6d7e4d2b4197774e71e
5b5cc6d7e4d2b4197774e71e- 1vitamin Cfalse
- 2niacinfalse
- 3riboflavinfalse
- 4all of the abovetrue
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उत्तर : 4. "all of the above"
व्याख्या :
Answer: D) all of the above Explanation:
प्र: Which one of the following vitamins is known as the anti sterile factor ? 4491 05b5cc6d7e4d2b4197774e719
5b5cc6d7e4d2b4197774e719- 1Ascorbic acidfalse
- 2Riboflavintrue
- 3Niacinfalse
- 4Retinolfalse
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उत्तर : 2. "Riboflavin"
व्याख्या :
Answer: B) Riboflavin Explanation:
प्र: Find the least number by which 175760 be divided to make it a perfect cube. 3694 05b5cc6d7e4d2b4197774e70f
5b5cc6d7e4d2b4197774e70f- 16false
- 210true
- 39false
- 430false
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उत्तर : 2. "10"
व्याख्या :
Answer: B) 10 Explanation: 175760 =2³ x 2 x 5 x 13³= 2³ x 2 x 5 x 13³ To make perfect cube, it must be divided by 2 x 5 = 10