GATE प्रश्न और उत्तर का अभ्यास करें
8प्र: A man can row against the current three fourth of a kilometer in 15 min and returns same distance in 10 min, then ratio of his speed to that of current? 2844 05b5cc6a8e4d2b4197774ce95
5b5cc6a8e4d2b4197774ce95- 15:1true
- 23:1false
- 34:1false
- 42:1false
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उत्तर : 1. "5:1"
व्याख्या :
Answer: A) 5:1 Explanation: Let the speed of the man in still water = p kmph Speed of the current = s kmph Now, according to the questions (p + s) x 10 = (p - s) x 15 2p + 2s = 3p - 3s => p : s = 5 : 1 Hence, ratio of his speed to that of current = 5:1.
प्र: After independence, the first state organized on the basis of language age is ? 2838 25b5cc6dfe4d2b4197774eb25
5b5cc6dfe4d2b4197774eb25- 1Karnatakafalse
- 2Punjabfalse
- 3Gujaratfalse
- 4Andhra Pradeshtrue
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उत्तर : 4. "Andhra Pradesh"
व्याख्या :
Answer: D) Andhra Pradesh Explanation:
प्र: An alloy contains gold and silver in the ratio 5 : 8 and another alloy contains gold and silver in the ratio 5 : 3. If equal amount of both the alloys are melted together, then the ratio of gold and silver in the resulting alloy is ? 2836 05b5cc67be4d2b4197774c1eb
5b5cc67be4d2b4197774c1eb- 1113/108false
- 2105/103true
- 3108/115false
- 4103/113false
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उत्तर : 2. "105/103"
व्याख्या :
Answer: B) 105/103 Explanation: As given equal amounts of alloys are melted, let it be 1 kg. Required ratio of gold and silver = 513 + 58813 + 38 = 105103. Hence, ratio of gold and silver in the resulting alloy = 105/103.
प्र: Statements : In a recent survey report, it has been stated that those who undertake physical exercise for at least half an hour a day are less prone to have any heart ailments. Conclusions : a) Moderate level of physical exercise is necessary for leading a healthy life.b) All people who do desk-bound jobs definitely suffer from heart ailments. 2833 05b5cc745e4d2b4197774fa31
5b5cc745e4d2b4197774fa31- 1Only a followstrue
- 2Both a & b followsfalse
- 3Only b followsfalse
- 4Neither a nor b followsfalse
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उत्तर : 1. "Only a follows"
व्याख्या :
Answer: A) Only a follows Explanation: The statement mentions that chances of heart ailments are greatly reduced by a regular half-hour exercise. So, a follows. However, it talks of only reducing the probability which does not mean that persons involved in sedentary jobs shall definitely suffer from heart ailments. So, b does not follow. Hence, concusion a only follows the given statement.
प्र: System Study involves 2824 05b5cc69be4d2b4197774c7d9
5b5cc69be4d2b4197774c7d9- 1documenting the existing systemfalse
- 2identifying current deficiencies and establishing new goalsfalse
- 3study of an existing systemfalse
- 4All the abovetrue
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उत्तर : 4. "All the above"
व्याख्या :
Answer: D) All the above Explanation:
प्र: Sound following a flash of lightning is called 2823 05b5cc67be4d2b4197774c1bd
5b5cc67be4d2b4197774c1bd- 1Stoningfalse
- 2Boltingfalse
- 3Thundertrue
- 4Cloud clashfalse
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उत्तर : 3. "Thunder"
व्याख्या :
Answer: C) Thunder Explanation: The Sound Following the flash of lighting is because of Thunder. Lightning is seen earlier than thunder because light travels much faster than sound. The roar of thunder is the result of a shock wave produced when lightning super-heats the air through which it passes, causing that air to expand very rapidly. This rapid expansion of air creates a shock wave that travels outward at close to the speed of sound.
प्र: At what time will B catch up with A, if A starts from a place at 11.00 A.M. and travels at a speed of 3.5 kmph, B starts at 1.00 P.M. and travels with speeds of 1 kmph for 1 hour, 2 kmph for the next 1 hour, 3 kmph for the next 1 hour and so on. 2820 05b5cc715e4d2b4197774f409
5b5cc715e4d2b4197774f409- 18 : 47 pmfalse
- 26 : 40 pmfalse
- 38 : 42 pmfalse
- 47 : 40 pmtrue
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उत्तर : 4. "7 : 40 pm"
व्याख्या :
Answer: D) 7 : 40 pm Explanation: At 1 pm ... Distance between A and B = 2x3.5 = 7 kmsat 2 pm .....Distance between A and B = 7 + 3.5 - 1 = 9.5 kmsAt 3 pm ....Distance between A and B = 9.5 + 3.5 - 2 = 11 kms.......At 7 pm distance between A and B = 3 kms.From 7 pm to 8 pm, speed of A = 3.5 kmphspeed of B = 8 kmphRelative speed = 4.5 kmph Time taken by B to meet A = 3/4.5 hrs = 30/45 hrs = 120/3 mins = 40 mins. So meeting time is 7 : 40 PM.
प्र: What is better, to have 70% discount or 40 and 30% discount consequently ? 2816 05b5cc70ee4d2b4197774f38f
5b5cc70ee4d2b4197774f38f- 140% is betterfalse
- 270% is bettertrue
- 3Both are samefalse
- 4Nonefalse
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उत्तर : 2. "70% is better"
व्याख्या :
Answer: B) 70% is better Explanation: Let Price be Rs.100 1st CASE: Then 100 x 70/100 = 70=> price after discount = 100-70 = Rs.30 2nd CASE: Then 100 x 40/100 = 40=> price after discount = 100-40 = Rs.60then60 x 30/100 = 18=> price after 2 consequent discount = 60-18 = Rs.42 =>from 1 and 2 cases, 70% discount is better.