1.

A cylinder has height 20 cm and base radius 4 cm. Then find its volume.

Answer»

When the square of the radius is multiplied by π we get the area of the circle.

Base area of the cylinder

= π × 42 = 16 π cm2

The height of the cylinder is 20 cm 

Volume = 16 π × 20 = 320 π cm3



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