When a metallic ball bearing is placed inside a cylindrical container of radius 2cm, the height of the water inside the container increases by 0.6cm. The radius, to the nearest tenth of a centimeter, of the ball bearing is
A
1cm
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B
1.2cm
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C
2cm
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D
0.6cm
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Solution
The correct option is B1.2cm When the ball was put in water, the volume of water increased by
π×22×0.6=2.4π cm3
The above volume is equal to the volume of the ball with radius r to find.