a circular Tunnel of diameter 2 M and length 1.4 km is dugout find the cost of plastering it at the rate 150 per 100 m square
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Circular tunnel is similar to the shape of cylinder
Its surface area is 2πrh2
2r=2m
h=1.4km=1400m
2πrh=2×π×1400 m²
Rate of plastering is 150/100 m²
For plastering 1m² money require is Rs1.5
Then for plastering 2800πm² cost require is 1.5×2800π=Rs. 13,194
Its surface area is 2πrh2
2r=2m
h=1.4km=1400m
2πrh=2×π×1400 m²
Rate of plastering is 150/100 m²
For plastering 1m² money require is Rs1.5
Then for plastering 2800πm² cost require is 1.5×2800π=Rs. 13,194
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