IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Who has become the first full time woman Defence Minister of India ? 1347 05b5cc6c7e4d2b4197774ded7
5b5cc6c7e4d2b4197774ded7- 1Sushma Swarajfalse
- 2Nirmala Sitharamantrue
- 3Uma Bharathifalse
- 4Smriti Iranifalse
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उत्तर : 2. "Nirmala Sitharaman"
व्याख्या :
Answer: B) Nirmala Sitharaman Explanation: Nirmala Sitharaman, who took oath as the new Cabinet member in september 2017 under Narendra Modi, has been given the Defence Ministry portfolio. Incidentally, she has become the first dedicated woman defence minister of India and only the second woman to hold the crucial ministry after Indira Gandhi.
प्र: Which international Airport Ltd has bagged the National Award for 'Excellence' in Energy Management ? 1263 05b5cc6c7e4d2b4197774decd
5b5cc6c7e4d2b4197774decd- 1New Delhifalse
- 2Lucknowfalse
- 3Hyderabadtrue
- 4Mumbaifalse
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उत्तर : 3. "Hyderabad"
व्याख्या :
Answer: C) Hyderabad Explanation:
प्र: Pavan and Sravan are two persons. If Pavan works with his actual efficiency and Sravan twice of his actual efficiency then it takes 25 days to complete the work. But If Pavan works twice of his actual efficiency and Sravan with his normal efficiency then the work is completed in 20 days. How many days would it take if Sravan alone works with his actual efficiency (in Days)? 1783 05b5cc6c7e4d2b4197774ded2
5b5cc6c7e4d2b4197774ded2- 150false
- 2100true
- 370false
- 435false
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उत्तर : 2. "100"
व्याख्या :
Answer: B) 100 Explanation: Let the Efficiency of pavan be E(P) Let the Efficiency of sravan be E(S) Here Work W = LCM(25,20) = 100 Now, E(P+2S) = 100/25 = 4 ....(1) E(2P+S) = 100/20 = 5 ....(2) Hence, from (1) & (2) we get E(S) = 1 => Number of days Savan alone work to complete the work = 100/1 = 100 days.
प्र: Milk and water are mixed in a vessel A as 4:1 and in vessel B as 3:2. For vessel C, if one takes equal quantities from A and B, find the ratio of milk to water in C. 1259 05b5cc6c7e4d2b4197774dec8
5b5cc6c7e4d2b4197774dec8- 11:9false
- 29:1false
- 33:7false
- 47:3true
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उत्तर : 4. "7:3"
व्याख्या :
Answer: D) 7:3 Explanation: Ratio of Milk and water in a vessel A is 4 : 1 Ratio of Milk and water in a vessel B is 3 : 2 Ratio of only milk in vessel A = 4 : 5 Ratio of only milk in vessel B = 3 : 5 Let 'x' be the quantity of milk in vessel C Now as equal quantities are taken out from both vessels A & B => 4/5 : 3/5 x 3/5-x x - 4/5 => 35-xx-45 = 11 (equal quantities) => x = 7/10 Therefore, quantity of milk in vessel C = 7 => Water quantity = 10 - 7 = 3 Hence the ratio of milk & water in vessel 3 is 7 : 3
प्र: What approximate value will come in place of question mark (?) in the following question ? (49.001)2 = ? 1709 05b5cc6c7e4d2b4197774dec3
5b5cc6c7e4d2b4197774dec3- 12500false
- 22400true
- 32600false
- 42300false
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उत्तर : 2. "2400"
व्याख्या :
Answer: B) 2400 Explanation: Given (49.001)2 = ? => =~ 49 x 49 =~ 2401 =~ 2400
प्र: 60 percent of 2/7 of three-fourth of a number is 2664. What is the number ? 1339 05b5cc6c7e4d2b4197774deb9
5b5cc6c7e4d2b4197774deb9- 120720true
- 221352false
- 325421false
- 424150false
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उत्तर : 1. "20720"
व्याख्या :
Answer: A) 20720 Explanation: Let N be the required number. => 60100x27x34xN=2664 => N = 2664x2x7x5/9 => N = 20720.
प्र: Priya can do a work in 16 days. In how many days will the work be completed by Sai, if the efficiency of Sai is 60% more than that of Priya ? 1433 05b5cc6c7e4d2b4197774deaf
5b5cc6c7e4d2b4197774deaf- 18 daysfalse
- 212 daysfalse
- 314 daysfalse
- 410 daystrue
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उत्तर : 4. "10 days"
व्याख्या :
Answer: D) 10 days Explanation: Ratio of efficiencies of Priya and Sai is Sai : Priya = 160 : 100 = 8 : 5 Given Priya completes the work in 16 days Let number of days Sai completes the work be 'd' => 5×16 = 8×d d = 10 days. Therefore, number of days Sai completes the work is 10 days.
प्र: Uma sold an article for 3400 and got a profit of 25%. If he had sold the article for Rs. 3265. How much profit% would Uma have got ? 1186 05b5cc6c7e4d2b4197774deb4
5b5cc6c7e4d2b4197774deb4- 122%false
- 227%false
- 320%true
- 418%false
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उत्तर : 3. "20%"
व्याख्या :
Answer: C) 20% Explanation: Given 125% ---- 3400 => 100% ---- ? => ? = 3400x100/125 = 2720 => Cost price of the article = Rs. 2720 Profit when article sold at Rs. 3265 = 3265 - 2720 = 545 Hence, Profit% = Gain x 100/cost price => P% = 545 x 100/2720 => P% = 20%

