The circumferences of two concentric are 176 m and 132 m respectively. what is t

Question

The circumferences of two concentric are 176 m and 132 m respectively. what is the difference between their radii?

Options:

A . 8 meter

B . 44 meter

C . 5 meter

D . 7 meter

Answer: Option D

? 2?R - 2?r = (176-132)? 2?(R-r) = 44? R-r = ( 44 x 7 )/ (2 x 22)= 7 m

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