IIT JEE Practice Question and Answer
8Q: In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit ? 1833 05b5cc723e4d2b4197774f67c
5b5cc723e4d2b4197774f67c- 160%false
- 250%false
- 370%true
- 445%false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "70%"
Explanation :
Answer: C) 70% Explanation: Let C.P.= Rs. 100. Then, Profit = Rs. 320, S.P. = Rs. 420. New C.P. = 125% of Rs. 100 = Rs. 125New S.P. = Rs. 420. Profit = Rs. (420 - 125) = Rs. 295 Required percentage = (295/420) * 100 = 70%(approx)
Q: Two trains are running with speeds 30 kmph and 58 kmph respectively in the same direction. A man in the slower train passes the faster train in 18 seconds. Find the length of the faster train? 1833 05b5cc67ee4d2b4197774c23f
5b5cc67ee4d2b4197774c23f- 1105 mtsfalse
- 2115 mtsfalse
- 3120 mtsfalse
- 4140 mtstrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "140 mts"
Explanation :
Answer: D) 140 mts Explanation: Speeds of two trains = 30 kmph and 58 kmph => Relative speed = 58 - 30 = 28 kmph = 28 x 5/18 m/s = 70/9 m/s Given a man takes time to cross length of faster train = 18 sec Now, required Length of faster train = speed x time = 70/9 x 18 = 140 mts.
Q: One fathom is equal to how many meters ? 1832 05b5cc6bee4d2b4197774d9b0
5b5cc6bee4d2b4197774d9b0- 11.7699false
- 22.0210false
- 31.8288true
- 42.1212false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "1.8288"
Explanation :
Answer: C) 1.8288 Explanation: One fathom = 1.8288 meters = 6 feet A fathom is a unit of length used especially for measuring the depth of water.
Q: Fa Hien visited india during the reign of 1830 05b5cc666e4d2b4197774bf03
5b5cc666e4d2b4197774bf03- 1Harshavardhanafalse
- 2Chandragupta Mauryafalse
- 3Ashokafalse
- 4Chandragupta Vikramadityatrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "Chandragupta Vikramaditya"
Explanation :
Answer: D) Chandragupta Vikramaditya Explanation: Fahien came to India during the reign of Chandragupta Vikramaditya.
Q: Which of the following is malleable? 1830 05b5cc6a4e4d2b4197774cc55
5b5cc6a4e4d2b4197774cc55- 1Icefalse
- 2Goldtrue
- 3Stonefalse
- 4Potteryfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "Gold"
Explanation :
Answer: B) Gold Explanation: Here in the given options, Gold is a malleable substance. Malleable substance means a metal or a material able to be hammered or pressed into shape without breaking or cracking. i.e, tensile.
Q: What are the four main functions of a computer? 1830 05b5cc6b7e4d2b4197774d638
5b5cc6b7e4d2b4197774d638- 1Data, information, bits and bytesfalse
- 2Hardware, software, modeling and operationsfalse
- 3Input, processing, output and storagetrue
- 4Learning, thinking, intelligence and virtuosityfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "Input, processing, output and storage"
Explanation :
Answer: C) Input, processing, output and storage Explanation: The four main functions of a computer are :: 1. Input, 2. Processing, 3. Output and 4. Storage
Q: How much time will take for an amount of Rs. 450 to yield Rs. 81 as interest at 4.5% per annum of simple interest ? 1830 05b5cc6e0e4d2b4197774eb8e
5b5cc6e0e4d2b4197774eb8e- 14 yearstrue
- 22.5 yearsfalse
- 33.5 yearsfalse
- 42 yearsfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "4 years"
Explanation :
Answer: A) 4 years Explanation: Time = (100 x 81) / (450 x 4.5) = 4 years.
Q: Select the correct statement about the Evolution of Animals. 1829 05b5cc6b0e4d2b4197774d29d
5b5cc6b0e4d2b4197774d29d- 1The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old.true
- 2No animal fossils are found in strata formed before the Cambrian explosion.false
- 3Approximately half the phyla of living organisms are found in Cambrian sediments.false
- 4All the abovefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old."
Explanation :
Answer: A) The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old. Explanation: The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old.