Question

If the lateral surface area of a cylinder is $94.2 cm^{2}$

and its height is 5cm then find its radius of the base.

take $\pi$ = 22/7

Answer 1

Answer:

Answer

Given, h=5cm

⇒Let radius =r

(i) Curved Surface Area

⇒94.2cm

2

=2πrh

⇒94.2 cm

2

=2×3.14×r×5cm

⇒r=3cm

(ii) Volume of cylinder

⇒πr

2

h=3.14×3×3×5

=141.2cm

3

Answer 2

$\huge \fbox \red{Answer}$

Given:

LSA of cylinder = 94.2cm²

height = 5cm

LSA of Cylinder = 2πrh

$94.2 = 2 \times \frac{22}{7} \times r \times 5$

$94.2 = \frac{220}{7} \times r$

$r = \frac{7}{22} \times 94.2$

$r = \frac{659.2}{22}$

r = 29.97 cm

Hence, radius is 29.97cm.