Question
How many iron rods , each of length 7 m and diameter 2 cm can be made out of 0.88 cubic metre of iron ?
Answer: Option A
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Volume of 1 rod = `(22/7 xx 1/100 xx 1/100 xx 7) cu.m. = 11/5000 cu.m`
Volume of iron = 0.88 cu.m..
Number of rods = `(0.88 xx 5000/11) ` = 400.
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