Question

If radius of the sphere is 7/2cm then find it's t.s.a

Answer 1

115.5 cm cube

puat formula of tsa 3pie rsquare

3×22/7×7/2×7/2

33×3.5

115.5cm

Answer 2

$\blue{\bold{\underline{\underline{Answer:}}}}$

$\green{\therefore{\text{T.S.A\:of\:sphere=154\:cm}^{2}}}$

$\orange{\bold{\underline{\underline{Step-by-step\:explanation:}}}}$

$\green{ \underline \bold{Given : }} \\ : \implies \text{Radius(r) = 3.5\: cm} \\ \\ \red{ \underline \bold{To \: Find : }} \\:\implies \text{T.S.A\: of \: sphere= ? }$

• According to given question :

$\bold{As \: we \: know \: that} \\ : \implies \text{T.S.A\: of \: sphere} =4\pi r^{2} \\ \\ : \implies \text{T.S.A\: of \: sphere} =4 \times \frac{22}{7} \times (3.5)^{2} \\ \\ : \implies \text{T.S.A\: of \: sphere} =4 \times 22\times 1.75 \\ \\ \green{ : \implies \text{T.S.A\: of \: sphere} = 154\: {cm}^{2}}\\\\ \purple{\text{Some\:formula\:related\:to\:this\:topic}}\\ \pink{\circ\:\text{Volume\:of\:sphere}=\frac{4}{3}\pi r^{3}}$