Question

Bina wants to decorate a circular
cake of diameter 15cm with
cream on its edge. Find the
cost of decorating the circular
cake of it cost ₹ 20 per cm.
(Given pi-3.14)

​

Answer 1

Answer:

Diameter = 15

then radius = 7.5cm

Circumference of the circle = 2pir

= 2* 3.14*7.5cm

=47.1cm

cost of decorating the circular cake = rs 20* 47.1

= Rs 942

Answer 2

Answer:

diameter=15cm

radius=15/2

perimeter=2×pi×r

=2×3.14×15/2

=47.1cm

cost of cake=47.1×20

=942