Question

Length of tape required to cover the edges of a semicircular disc of diameter 14 cm is _________​

Answer 1

Answer:

A correct.

From the above figure,

Perimeter of the semi-circle = circumference of semi-circle +diameter

∵ circumference of semi − circle =

2

2πr

.

⇒

7

22

×10=31.4cm

Therefore, total tape required

=31.4+2×10=51.4cm

Answer 2

Answer:

Length of the tape required to cover the edges of a semicircular disc of diameter 14cm is 36cm

Step-by-step explanation:

d=14cm

r=7cm

perimeter of a semicircle=1/2(2πr)+d

=(22/7)(7)+14

=22+14

perimeter of the given semicircle=36