A rectangular grassy plot 110 m. by 65 m has a gravel path 2.5 m wide

1.	A rectangular grassy plot 110 m. by 65 m has a gravel path 2.5 m wide all round it on the inside. Find the cost of gravelling the path at 80 paise per sq. metre.
Answer» Area of the plot = (110 x 65) m² = 7150 m² Area of the plot excluding the path = [(110 - 5) * (65 - 5)] m² = 6300 m² . Area of the path = (7150 - 6300) m² = 850 m² . Cost of gravelling the path = Rs.850 * (80/100)= Rs. 680

A rectangular grassy plot 110 m. by 65 m has a gravel path 2.5 m wide all round it on the inside. Find the cost of gravelling the path at 80 paise per sq. metre.

Answer»

Area of the plot = (110 x 65) m² = 7150 m²

Area of the plot excluding the path = [(110 - 5) * (65 - 5)] m² = 6300 m² .

Area of the path = (7150 - 6300) m² = 850 m² .

Cost of gravelling the path = Rs.850 * (80/100)= Rs. 680