Question

find the volume and curved surface area of a right circular cylinder of height 21cm nd base radius 5cm​ ​

Answer 1

Answer:

volume= 330 cm^3

curved surface area =412.5 cm^2

Step-by-step explanation:

radius=d/2=5/2=2.5 cm

height = 21 cm

volume of cylinder = 2 x 22/7 x 2.5 x 21

                               = 330 cm^3

curved surface area of cylinder = 22/7 x 2.5 x 2.5 x 21

                                                    = 412.5 cm^2

Answer 2

Answer:

Volume=1650 cubic cm

C. S. A. =660 sq. Cm

Step-by-step explanation:

Height (h) =21cm

Radius (r) =5 cm

Volume of cylinder =

$\pi \: r ^{2} h$

=22/7 x 5 x 5 x 21

=1650 cubic centimetres

C. S. A. Of cylinder =

$2\pi \: r ^{2} h$

= 2 x 22/7 x 5 x 21

= 660 sq. Cm

Hope it helps!