IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: A man reduces his travelling time by a fraction of 2/5, as a result the distance covered by the man is increased by 20%, find the percentage increase in the speed of the man ? 1459 05b5cc6c5e4d2b4197774dddc
5b5cc6c5e4d2b4197774dddc- 177%false
- 288%false
- 3100%true
- 499%false
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उत्तर : 3. "100%"
व्याख्या :
Answer: C) 100% Explanation:
प्र: Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. In which part of the sentence there is an error ? 1459 05b5cc6e9e4d2b4197774ee37
5b5cc6e9e4d2b4197774ee37- 1He isfalse
- 2Not agreeingfalse
- 3To me.true
- 4No errorfalse
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उत्तर : 3. "To me."
व्याख्या :
Answer: C) To me. Explanation: Replace 'to' by 'with'.
प्र: A is sister of B who is mother of C who is mother of D. E is the grand mother of D. Then how C is related to E ? 1459 05b5cc6e5e4d2b4197774ed60
5b5cc6e5e4d2b4197774ed60- 1Sisterfalse
- 2Daughterfalse
- 3Motherfalse
- 4Daughter-in-lawtrue
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उत्तर : 4. "Daughter-in-law"
व्याख्या :
Answer: D) Daughter-in-law Explanation: GM GMA ---- B ---- E | | C | | D (Grand son or daughter)
प्र: What temperature is considered freezing? 1458 05b5cc69fe4d2b4197774ca32
5b5cc69fe4d2b4197774ca32- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
We have all been taught that water freezes at 32 degrees Fahrenheit, 0 degrees Celsius, 273.15 Kelvin. That's not always the case, though. Scientists have found liquid water as cold as -40 degrees F in clouds and even cooled water down to -42 degrees F in the lab.
प्र: On multiplying a number by 7, the product is a number each of whose digits is 3. The smallest such number is ? 1458 05b5cc6dfe4d2b4197774eac6
5b5cc6dfe4d2b4197774eac6- 1476190476false
- 248617false
- 347619true
- 44587962false
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उत्तर : 3. "47619"
व्याख्या :
Answer: C) 47619 Explanation: By hit and trail, we find that 47619 x 7 = 333333. 7) 333333 (47619 333333---------------- 0 And 476190476 x 7 = 3333333333 but smallest number is 47619.
प्र: If a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius, then surface area of each ball (in sq.cm) is ? 1458 05b5cc6ebe4d2b4197774ee69
5b5cc6ebe4d2b4197774ee69- 1100 πtrue
- 2101/πfalse
- 399 π/12false
- 454/13πfalse
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उत्तर : 1. "100 π"
व्याख्या :
Answer: A) 100 π Explanation: 4/3 π x 10 x 10 x 10 = 8 x 4/3 π x r x r x rr = 54π x 5 x 5 = 100π
प्र: A take twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in ? 1457 05b5cc6eee4d2b4197774eee6
5b5cc6eee4d2b4197774eee6- 13 hrsfalse
- 26 hrstrue
- 37 hrsfalse
- 45 hrsfalse
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उत्तर : 2. "6 hrs"
व्याख्या :
Answer: B) 6 hrs Explanation: Suppose A, B and C take x, x/2 and x/3 respectively to finish the work. Then, (1/x + 2/x + 3/x) = 1/2 6/x = 1/2 => x = 12 So, B takes 6 hours to finish the work.
प्र: World’s largest floating Solar Farm launched in ____________. 1457 05b5cc6d7e4d2b4197774e6f1
5b5cc6d7e4d2b4197774e6f1- 1Japanfalse
- 2Chinatrue
- 3Russiafalse
- 4Francefalse
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उत्तर : 2. "China"
व्याख्या :
Answer: B) China Explanation: China flicked the switch on the world’s largest floating solar energy plant. The massive waterborne plant is expected to generate 40 megawatts at one time and could supply electricity for over 15,000 homes. The pioneering project, located in eastern China, is thought to cement China’s status as a top producer of solar energy in the world. The plant has been built in Huainan city, Anhui Province, by Sungrow Power Supply, a Chinese company specialised in renewable energy.