2.A momento is made as shown in
figure. Its base PBCR is silver
plated from the front side. Find the
area which is silver plated. (Use =
22/7) *
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r= radius of circle= 7cm. area of sector APR=90×22×7×7/(360×7) = 22× 7/4 = 38.5 square cm. area of silver coated base (PBCR)= area of ∆ABC - area of sector APR. = 50 -38.5 = 11.5 square cm.
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