37) The area of the region enclosed between two concentric circles of radii 8 cm and 4 cm is
a) 48 cm2 b) 80 cm2 c) 48 p cm2 d) 80 p cm2

Area enclosed between two concentric circles=Area of bigger circle-Area of smaller circle=π82-π42=π82-42=π64-16=48π cm2Hence, option c is correct.

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Area of bigger circle - area of smaller circle
pi x 64 - pi x 16
=> 48 pi cm2
option (c)

Hope this helps!
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