Question

How many iron rods, each of length 7 mts and diameter 2 cms can be made out of 0.88 cubic metre of iron ?

A) 500 B) 600 C) 400 D) 300

Answer 1

Answer:

Answer: C) 400

Number of rods = (0. 88×500011) = 400.

Step-by-step explanation:

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×[1100]2×7)cu. m = 115000 cu. m

Given volume of iron = 0.88 cu. m

Therefore, Number of rods = (0.88×500011) = 400.

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