# Moving Safe

A heavy safe is to be moved. Two cylindrical steel bats of diameter 7 centimeters are used as rollers.

When the rollers have made one revolution, how far will the safe have moved forward?

3 Comments

A heavy safe is to be moved. Two cylindrical steel bats of diameter 7 centimeters are used as rollers.

When the rollers have made one revolution, how far will the safe have moved forward?

3 Comments

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2 * 22/7*7/2= 22 cms.

2*22/7*7/2=22cms

diameter=7cm

radius=7/2

Perimeter of circle = 2 *pi*R

= 2*22/7*7

= 44 cms