Question

The volume of a cyclinder is 2512 cu cm and its height is 12.5 cm. Find the radius of its base.(take value = 3.14)

Answer 1

Volume of a cylinder= 3.14 × r × r × h
2512 cm³ = 3.14 × r × r × 12.5
2512 = 39.250 × r²
2512 ÷ 39.25 = r²
64 = r²
√64 = 8 = r
∴ r = 8

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Answer 2

The volume of the cylinder=2512cm³
The height of the cylinder =12.5cm
Therefore, volume of the cylinder =
$\pi \: r \times r \times \: h= 2512$
3.14×r×r×12.5=2512
r²=2512×100×10/314×125
r²=64
r²=(8)²
r=8
Therefore the radius of its base is 8cm