Question

the curved surface area of cylinder is 176 CM square and its height is 21 CM calculate its radius​

Answer 1

Answer:

CSA =2πrh

176=2* 22/7*r

r=176*7/44

r=28

Answer 2

Its radius is 1.33 cm

Step-by-step explanation:

Let the radius be r

Curved surface area of cylinder =$2 \pi r h$

Height of cylinder = h = 21 cm

Curved surface area of cylinder =$2 \times \frac{22}{7} \times r \times (21)$

We are given that the curved surface area of cylinder is 176 CM square

So,$2 \times \frac{22}{7} \times r \times (21) = 176$

$r=\frac{176 \times 7}{2 \times 22 \times 21}$

r=1.33 cm

Hence Its radius is 1.33 cm

#Learn more:

The curved surface area of a right circular cylinder of height 21 cm is 176 cm. Find the diameter of the base

of the cylinder.

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