Question

A semicircular shaped window has diameter of 63cm. Its perimeter equals
A) 162
B) 132
C) 142
D) 172

Answer 1

Answer:   A) 162 

Explanation:

perimeter of window = ππr+2r 
= [(22/7) x (63/2) + 63] = 99+63 = 162 cm

Answer 2

Here it is given that,

Diameter of the Semicircle = 63 cm

Now, we are required to find out its Perimeter.

$= > \: perimeter \: = \frac{1}{2} \times \pi \: \times d \: + d$

$= > \: p \: = \frac{1}{2} \times \frac{22}{7} \times 63 + 63$

$= > \: p \: = 11 \times 9 + 63$
$= > \: p \: = 99 + 63$

$= > \: p = 162 \: cm \:$

Hence, Option A Is correct.
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