question Number 14 : a circular Park of radius 2o cm ...........................
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park radius = r = 20m
width of the path (w)= 5m
radius including with path = R = r+w =20+5 =25m
area of the path = π(R²-r²)
=22/7(25²-20²)
=22/7(625-400)
=22/7*225
=4950/7sqm
cost per 1sqm metalling the road = Rs14
cost = 4950/7 *14
= 4950*2
=Rs9900
width of the path (w)= 5m
radius including with path = R = r+w =20+5 =25m
area of the path = π(R²-r²)
=22/7(25²-20²)
=22/7(625-400)
=22/7*225
=4950/7sqm
cost per 1sqm metalling the road = Rs14
cost = 4950/7 *14
= 4950*2
=Rs9900
amisha10:
thank you very much
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