20/Jan Math RECALL-Best gmat prep 2022(6)

WHAT IS RECALL?

RECALL is real exam questions according to latest examinee’s recall (REQALER).

There is a playground with two semicircles on both sides, a rectangle in the middle, and a layer of outer circle on the outside (it is also the same shape, but the radius of the semicircle is 8 larger than the radius of the inner circle). Find the difference between the perimeters of the inner and outer circles? Inner ring circumference 400