find the volume of this cylinder. give your answer to 1 decimal place. Base is 9cm. Length is 20cm.

1272.5cm^3.

Step-by-step explanation:

radius(r) = 1/2 of base length

= 1/2 × 9 = 4.5cm.

length/height of the cylinder(h) = 20cm.

Volume of the cylinder = πr2h

= 3.142 × 4.5^2 × 20

= 3.142 × 20.25 × 20

= 1272.5cm^3.

i used to know how to do this in 7th but i forget easily

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