Question

Que : If the surface area of sphere is 346.5 cm2, then its radius  [takingπ=22/7] is

Answer 1

Hey dear !!


Here is yr answer
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Given,

SA of sphere = 346.5cm²

π=22/7

radius (r) = ?

Now,

SA of sphere = 4πr²

4πr² = 346.5

4×22/7×r² = 346.5

r² = 346.5 × 1/4 × 7/22

r² = 27.5625

r = √27.5625

r = 5.25


Therefore, radius = 5.25cm


Hope it hlpz.....

Answer 2

Area of sphere = π$r^{2}$
π$r^{2}$=346.5
$\frac{22}{7}$*r*r=346.5
227r2=346.5
r2=110.25
r=10.5,−10.5
r=10.5