IIT JEE Practice Question and Answer
8Q: Two trains start from same place at same time at right angles to each other. Their speeds are 36km/hr and 48km/hr respectively. After 30 seconds the distance between them will be ? 2752 05b5cc731e4d2b4197774f819
5b5cc731e4d2b4197774f819- 1900 mtsfalse
- 2300 mtsfalse
- 3250 mtsfalse
- 4500 mtstrue
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Answer : 4. "500 mts"
Explanation :
Answer: D) 500 mts Explanation: Using pythagarous theorem,distance travelled by first train = 36x5/18x30 = 300mdistance travelled by second train = 48x5/18x30 = 400mso distance between them =√( 90000 + 160000) = √250000 = 500mts.
Q: Five boxes of bananas sell for Rs. 30. how many boxes can you buy for Rs.9? 2751 05b5cc636e4d2b4197774b9ff
5b5cc636e4d2b4197774b9ff- 12false
- 21.5true
- 31.25false
- 42.5false
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Answer : 2. "1.5"
Explanation :
Answer: B) 1.5 Explanation: Given Five boxes of bananas sell for Rs. 30. => 1 Box of Bananas for = 30/5 = Rs. 6 Then, for Rs. 9 => 9/6 = 3/2 = 1.5 Hence, for Rs. 9, 1.5 box of bananas can buy.
Q: Arun and Varun started business in partnership investing Rs. 20,000 and Rs. 15,000 respectively. After six months, Akhil joined them with Rs. 20,000. What will be Varun's share in the total profit of Rs. 25,000 earned at the end of 2 years from the starting of the business ? 2747 05b5cc6fbe4d2b4197774f0f1
5b5cc6fbe4d2b4197774f0f1- 1Rs. 7500true
- 2Rs. 4520false
- 3Rs. 8750false
- 4Rs. 6350false
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Answer : 1. "Rs. 7500"
Explanation :
Answer: A) Rs. 7500 Explanation: Arun : Varun : Akhil = (20000 x 24) : (15000 x 24) : (20000 x 18) = 4:3:3 B's share = 25000 x 3/10 = Rs. 7500.
Q: Hardest Part of the Human Body? 2747 05b5cc6b9e4d2b4197774d761
5b5cc6b9e4d2b4197774d761- 1Tooth Enameltrue
- 2Femurfalse
- 3Temporal bone of skullfalse
- 4Knee bonefalse
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Answer : 1. "Tooth Enamel"
Explanation :
Answer: A) Tooth Enamel Explanation: Tooth Enamel is the hardest and most highly mineralized substance in the human body. It is a tissue and not a bone. This tissue has high mineral content which makes it hardest substance. Femur and Temporal bone of the skull are the hardest bones of the human body.
Q: Which Country has opened its fifth Nuclear Power Plant to meet its growing energy demands ? 2746 05b5cc6c6e4d2b4197774de63
5b5cc6c6e4d2b4197774de63- 1Indiafalse
- 2Pakistantrue
- 3Russiafalse
- 4Chinafalse
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Answer : 2. "Pakistan"
Explanation :
Answer: B) Pakistan Explanation:
Q: Which one of the following is a landlocked harbour ? 2744 05b5cc6d5e4d2b4197774e5de
5b5cc6d5e4d2b4197774e5de- 1Mumbaifalse
- 2Haldiafalse
- 3Vishakapatnamtrue
- 4Ennorefalse
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Answer : 3. "Vishakapatnam"
Explanation :
Answer: C) Vishakapatnam Explanation:
Q: Translation of the dna sequence AAGCTGGGA would result in 2743 05b5cc696e4d2b4197774c58f
5b5cc696e4d2b4197774c58f- 1a DNA strand with the base sequence TTCGACCCTtrue
- 2an mRNA strand with the sequence TTCGACCCTfalse
- 3a sequence of three amino acids linked by peptide bondsfalse
- 4an mRNA strand with the sequence UUGCACCCUfalse
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Answer : 1. "a DNA strand with the base sequence TTCGACCCT"
Explanation :
Answer: A) a DNA strand with the base sequence TTCGACCCT Explanation: Translation of the dna sequence AAGCTGGGA would result in a DNA strand with the base sequence TTCGACCCT.
Q: A constructor estimates that 4 people can paint Mr. Karthik's house in 6 days. If he uses 5 people instead of 4, how long will they take to complete the job ? 2741 05b5cc74ae4d2b4197774fac2
5b5cc74ae4d2b4197774fac2- 13 daysfalse
- 226/3 daysfalse
- 313/4 daysfalse
- 424/5 daystrue
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Answer : 4. "24/5 days"
Explanation :
Answer: D) 24/5 days Explanation: we know that m1 x d1 = m2 x d2=> 4 x 6 = 5 x dwhere d = no. of days taken by 5 men to paintd = 24/5 days.