IBM Company Numerical Ability Area and Volume

A square tin sheet is made into a cube by cutting a square each from all corners and then folding the sides up. If this cube can hold 1000 ml of water, what was the side of the original tin sheet?

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IBM Other Question

An F1 driver races a 4 laps at speeds of 270, 270, 290 and 280kmph. What is his average speed in the whole race? How many cylinders of radius r/10 and height h/10 can be formed by melting and reforging a metalic cylinder of radius h and height r?