Question

find the area of base of cylinder whose radius is 7 cm

Answer 1

cylinder is having a circular base
so, area is πr^2
area = 22/7 * 7 * 7
= 22 * 7
= 154 cm^2

Answer 2

Base of a Cylinder is Circular in shape !

So area of base of a Cylinder = πr²

Here r = 7 cm

$and \: take \: π \: as \: \frac{22}{7} \\ \\ area = \pi \times {7}^{2} = \frac{22}{7} \times 7 \times 7 = 22 \times 7 = 154 \: cm {}^{2}$
Area of Base of the cylinder is 154 cm²