Question
An iron cube of side 10 cm is hammered into a rectangular sheet of thickness 0.5 cm . If the sides of the sheet are in the ratio 1 : 5 , the sides are :
Answer: Option B
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Let he sides of the sheet be` x and 5x`, Then ,
Volume of the sheet = Volume of the cube
`rArr x xx 5x xx 1/2 = 10 xx 10 xx 10`
`rArr 5x^2 = 2000`
`rArr x^2 = 400`
`rArr x = 20`
`:.` The sides are 20 cm and 100 cm .
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