Question

find the radius of the Sphere, whose area is 154 cm²

Answer 1

Area of sphere =4/3×πr^3=154
4/3×22/7×r^3=154
By simplifying we get r^3=36.75
R=cube root of 36.75

Answer 2

CORRECT QUESTIONS :-

find the radius of the Sphere, whose surface area is 154 cm²

GIVEN ,

area is 154 cm²

Find,

radius of the Sphere

REQUIRED ANSWER :-

➠S A of sphere $\: = 4\pi \: r h$

➠ $4\pi \: r {}^{2} = 154$

➠ $4 \times \frac{22}{7} \times r {}^{2} = 154$

➠ $r {}^{2} = \frac{154 \times 7}{4 \times 22} = 12.25$

➠ $\pi = \sqrt{1225} = 3.5 \: cm$

Hence, proved ...