Question

Find the surface area of sphere of Diameter 14cm, 21cm, 3.5cm

Answer 1

for 14cm=4×22/7×7cm×7cm
=616cm2

for 21cm=4×22/7×21/2cm×21/2
1386cm2

for3.5cm=4×22/7×3.5/2cm×3.5/2cm
=38.5cm2

Answer 2

$\huge\mathfrak{Hello \ friends}$

Diameter of sphere = 14cm

Radius of sphere = 14/2

=7cm

Surface area of sphere = 4 pie²

= 4× 22/7×7×7

= 616 cm²