Question

the volume of a right circular cylinder is 1100cm3 s radius of its base is 5cm. find the curved surface area.

Answer 1

Given :- Volume of the cylinder = 1100cm3
Radius = 5cm

Then,

Volume of cylinder = 1100
=> 2πr(h+r) = 1100
=> 2 × 22/7 × 5 ( h + 5 ) = 1100
=> 220/7 ( h + 5 ) = 1100
=> 220h/7 + 1100/ 7 = 1100
=> 220h + 1100 /7 = 1100
=> 220h + 1100 = 7700
=> 220h = 7700 - 1100
=> h = 6600/ 220 = 30

Now height = 30cm

Then, Curved surface area = 2πrh
= 2 × 22/7 × 5 × 30
= 942.8 cm2

Answer 2

Answer:

Given:-

Volume of right circular cylinder = 1100 cm³

It's Base Radius = 5 cm

Solution:-

Volume of right circular cylinder = 1100 cm³

πr²h = 1100 cm³

22/7 × 25 × h = 1100 cm³

h = (1100×7)/(25×22)

h = 14 cm

Now,

Curved surface area of cylinder = 2πrh

=> 2×(22/7)×5×14

=> 440 cm²

Thus, curved surface area of right circular cylinder is 440 cm².