Area of cloth required for one flag = root under( √s(s - 25)(s - 25)(s - 22), where s = (25 + 25 + 22)/2 = 36 cm Area of cloth required = root under( √36(36 - 25)(36 - 25)(36 - 22) = root under( √36 x 11 x 11 x 14) = 6 x 11 √14 cm2 = 66√14 Area of cloth required for such 200 flags = 66√14 x 200 = 13200√14 cm2 Helpfullness, cooperation, beauty.