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Question

The difference between the circumference and radius of a circle is 37 cm. The area of the circle is 

(a) 111cm2(b)184cm2(c)154cm2(d)259cm2
 


Solution

Taking pi as 3.14 will give an approximate answer. You can do it by taking 227 as well

Let the radius be r cm

Circumference will be,
2πr=2×3.14×r=6.28×r

According to the question 

 6.28r- 1r =37
5.28r = 37
r=375.28
r=approx.7cm

Area=πr2=3.14×7×7=154
Answer= 154 cm2


Mathematics
Secondary School Mathematics X
Standard X

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