जॉइन Examsbookउत्तर : 3. "400"
How many iron rods, each of length 7 mts and diameter 2 cms can be made out of 0.88 cubic metre of iron ?5
प्र: How many iron rods, each of length 7 mts and diameter 2 cms can be made out of 0.88 cubic metre of iron ?
- 1500false
- 2600false
- 3400true
- 4300false
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उत्तर : 3. "400"
व्याख्या :
Answer: C) 400 Explanation: Given length of iron rod =7 mts and and diameter of rod = 2 cms => r = 1/100 mts Therefore, Volume of one rod = πr2h cu. m = 227×11002×7cu. m = 115000 cu. m Given volume of iron = 0.88 cu. m Therefore, Number of rods = 0.88×500011 = 400.