find this 3 question
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let the radius of the outer circle =R = 56 m,
width of the road = w= 7m,
radius of the inner circle = r= R-w = 56-7 = 49m,
area of the road = pi* (R^2 - r^2)
= 22/7 * (R+r) (R-r)
= 22/7 * (56+49) (56-49)
=22/7 * 105*7
=22*105
=2310 square m
cost of paving 1 sq m road = Rs 50
cost of paving 2310 sq m road = 50 *2310 =Rs 11550
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This is the answer to the question no. 3
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pranali3:
wrong
which question you are asking
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