Question

(c) radius cm=21 height cm=5 what is the whole surface area​

Answer 1

Answer:

The radius is 5 cm and height is 21 cm.

Here, r=5 cm and h=21 cm.

Curved surface area =2πrh

=2×

7

22

×5×21

=44×15

=660 cm

2

∴ The curved surface area is 660 cm

2

Answer 2

Answer:

The radius is 5 cm and height is 21 cm.

Here, r=5 cm and h=21 cm.

Curved surface area =2πrh

=2×

7

22

×5×21

=44×15

=660 cm

2

∴ The curved surface area is 660 cm

2

Step-by-step explanation: