Question

The area of base of a right circular cylinder is 154 sq.cm. and its height is 1.5 cm .Its volume will be *
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Answer 1

Step-by-step explanation:

Given area of base of a cylinder = 154 sq. cm

ATP,

$area \: of \: base = \pi {r}^{2}$

$\pi {r}^{2} = 154$

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

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

${r}^{2} = 7 \times 7$

${r}^{2} = 49$

$r = \sqrt{49}$

$r = 7$

Radius of a cylinder is 7 cm.

$volume \: of \: a \: cylinder = \pi {r}^{2}h \: \: \: cubic \: unit$

$= \frac{22}{7} \times 7 \times 7 \times 1.5 \: \: cubic \: cm$

$= 22 \times 7 \times 1.5 \: \: cubic \: cm$

$= 231 \: \: cubic \: cm$

Answer:- The volume of a cylinder is 231 cubic cm.