Question

Find the volume of a cylinder in litres whose curved surface area is 154m and height is 3.5 m

Answer 1

CSA of cylinder= 2πrh

154=2×22/7×r×3.5

154/2=22/7×r×35/10

77=22×r×5/10

77/22=r×5/10

7/2=r×5/10

7/2=r×1/2

7×2/2=r

14/2=7=r

volume of cylinder= πr^2h

=22/7×7^2×3.5

=22/7×49×35/10

=22×7×35/10

=22×7×7/2

=11×7×7=77×7

=539

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