IIT JEE Practice Question and Answer
8Q: A boatman can row 96 km downstream in 8 hr. If the speed of the current is 4 km/hr, then find in what time he will be able to cover 8 km upstream ? 4189 05b5cc6e9e4d2b4197774ede3
5b5cc6e9e4d2b4197774ede3- 11.5 hrsfalse
- 21 hrsfalse
- 32.5 hrsfalse
- 42 hrstrue
- Show Answer
- Workspace
- SingleChoice
Answer : 4. "2 hrs"
Explanation :
Answer: D) 2 hrs Explanation: Speed in downstream = 96/8 = 12 kmph Speed of current = 4 km/hr Speed of the boatman in still water = 12 – 4 = 8 kmph Speed in upstream = 8 – 4 = 4 kmph Time taken to cover 8 km upstream = 8/4 = 2 hours.
Q: In how many years, Rs. 200 will produce the same interest @ 5 % as Rs. 900 produce in 2 years @ 3 ½ % ? 4174 05b5cc6dbe4d2b4197774e909
5b5cc6dbe4d2b4197774e909- 15.2 yrsfalse
- 27 yrsfalse
- 37.9 yrsfalse
- 46.3 yrstrue
- Show Answer
- Workspace
- SingleChoice
Answer : 4. "6.3 yrs"
Explanation :
Answer: D) 6.3 yrs Explanation: P = Rs. 900, R = 3 ½ % = 7/2 %, T = 2 years. Therefore, S.I. = PTR/100 S.I. = Rs. (900 x 7/2 x 2/100) = Rs. 63 Now, P = Rs. 200, S.I. = Rs. 63, R = 5 % Time = ((100 x 63) / (200 x 5) ) years = 6.3 years.
Q: In a certain code language, 'how can you go' is written as 'ja da ka pa', 'can you come here' is written as 'na ka sa ja' and 'cone and go' is written as 'ra pa sa'. How is 'here' written in that code ? 4172 05b5cc75ee4d2b4197774fca7
5b5cc75ee4d2b4197774fca7- 1natrue
- 2jafalse
- 3safalse
- 4Nonefalse
- Show Answer
- Workspace
- SingleChoice
Answer : 1. "na"
Explanation :
Answer: A) na Explanation: From the given information : how can you go = ja da ka pa....(1)can you come here = na ka sa ja...(2)come and go = ra pa sa....(3)from (1)&(2), can you = ja ka...(4)from (2)&(3), come = sa...(5)Using (4)&(5) in (2), we get here = na.
Q: Five men and nine women can do a piece of work in 10 days. Six men and twelve women can do the same work in 8 days. In how many days can three men and three women do the work ? 4170 05b5cc6e1e4d2b4197774ebbb
5b5cc6e1e4d2b4197774ebbb- 118 daysfalse
- 220 daystrue
- 316 daysfalse
- 414 daysfalse
- Show Answer
- Workspace
- SingleChoice
Answer : 2. "20 days"
Explanation :
Answer: B) 20 days Explanation: (5m + 9w)10 = (6m + 12w)8 => 50m + 90w = 48w + 96 w => 1m = 3w 5m + 9w = 5m + 3m = 8m 8 men can do the work in 10 days. 3m +3w = 3m + 1w = 4m So, 4 men can do the work in (10 x 8)/4 = 20 days.
Q: A can write 32 pages in 6 hours and B can write 40 pages in 5 hours. If they write together, in how many hours they can write 110 pages ? 4168 05b5cc711e4d2b4197774f3c8
5b5cc711e4d2b4197774f3c8- 17 hrsfalse
- 26 hrs 10 minfalse
- 35 hrs 25minfalse
- 48 hrs 15 mintrue
- Show Answer
- Workspace
- SingleChoice
Answer : 4. "8 hrs 15 min"
Explanation :
Answer: D) 8 hrs 15 min Explanation: A can write in 1hour = 32/6 pages Similarly, B in 1 hour = 40/5 pages Together (A+B) in 1 hour = 32/6 + 40/5 = 40/3 So, A+B write 40/3 pages in 1 hour A+B write 110 pages in (3/40) x 110 Hours = 8 hours 15 min.
Q: A hater of knowledge and learning is 4163 05b5cc6ace4d2b4197774d082
5b5cc6ace4d2b4197774d082- 1Philologistfalse
- 2Misologisttrue
- 3Bibliophilefalse
- 4Misogynistfalse
- Show Answer
- Workspace
- SingleChoice
Answer : 2. "Misologist"
Explanation :
Answer: B) Misologist Explanation: The one word substitution for a hater of knowledge and learning is Misologist.
Q: Soil erosion on hillslopes can be checked by 4153 05b5cc67ee4d2b4197774c26a
5b5cc67ee4d2b4197774c26a- 1Terrace cultivationtrue
- 2Contour ploughingfalse
- 3Afforestationfalse
- 4Strip croppingfalse
- Show Answer
- Workspace
- SingleChoice
Answer : 1. "Terrace cultivation"
Explanation :
Answer: A) Terrace cultivation Explanation: Hence, soil erosion on hillslopes can be checked by Terrace cultivation.
Q: Which of the Phrases(1), (2), (3) and (4) given below each sentence should replace the phrases printed in bold in the sentence to make it grammatically correct. The ban is applied by the district’s commercial taxes department after protests by a community, which had threat to burn theatres screening the controversial movie. 4146 05b5cc6c5e4d2b4197774dd5a
5b5cc6c5e4d2b4197774dd5a- 1had threated to burnfalse
- 2had threatened to burntrue
- 3had threatened to burningfalse
- 4had threats of burningfalse
- Show Answer
- Workspace
- SingleChoice
Answer : 2. "had threatened to burn"
Explanation :
Answer: B) had threatened to burn Explanation: