a circular mirror of radius 21 cm is surrounded by a circular frame of width 3.5 cm. find the cost of making the frame at 1.50rs per cm
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Find the area of inner circle with radius 21 cm
by πr^2
Find the area of outer circle with radius 24.5 cm by πr^2
Subtract both areas
Multiply it by Rs. 1.50
Answer:- Rs. 750.75
by πr^2
Find the area of outer circle with radius 24.5 cm by πr^2
Subtract both areas
Multiply it by Rs. 1.50
Answer:- Rs. 750.75
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