Question

The ratio between the radius of the base and the height of a cylinder is 2:3. If it's volume is 1616cm^3 , then find its total area​

Answer 1

Step-by-step explanation:

1. Let r=2x and h=3x.

V=πr

2

h

⟹

7

22

×(4x

2

)(3x)=1617

⟹x

3

=42.875

⟹x=3.5cm

Hence, r=7cm and h=10.5cm

Total surface area=2πrh+2πr

2

=2πr(r+h)

=2×

7

22

×7(17.5)

=770cm

2

Answer 2

Answer:

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Step-by-step explanation:

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