Question

Three semi circles are joined to get the pattern as shown in the fig. O p q are centres of the shaded region if the diameter of the largest semicircle is 28


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Answer 1

$area \: of \: largest \: semicircle + area \\ of \: two \: smller \: semicircle \\ \frac{\pi {14}^{2} }{2} + \pi {7}^{2}$
after solving you get 462