1.

The ratio of circumference and area of a circle is 2 : 7. Find its circumference. (A) 14 π (B) 7/π(C) 7π (D) 14/π

Answer»

(A) 14 π

Circumference/ (Area of circle) = 2/7

∴ 2πr/πr2 = 2/7

∴ r = 7

∴ Circumference = 2πr 

= 2 x π x 7  = 14π



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