Answer:
14
Explanation:
A=pi × r²
153.86 = 3.14 × r²
Divide both sides of the equation by 3.14
it becomes:
r²=153.86÷3.14
r²=49
taking the square root for both sides of the equation
r = 7
and
diameter = 2 × radius
diameter = 2 × 7 = 14
Helmet
(Tried my best) gloves are things weared for to protect the hands. The same goes for the head, helmet is to protect our head
NOUN, the state of being in short supply.
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