Question

3. The area of a courtyard is 3750 m. Find the cost of covering it with gravel to a height of 1 cm if the gravel costs Rs 6.40 per cubic metre. (Rs. 240)​

Answer 1

1cm=0,01m

V=3750.0,01=37,5 cubic metre

=>37,5.6,4=240Rs

Answer 2

Rs. 9000

Explanation:

convert 1 cm to metres:

1 meter = 100 cm

⇒ 1 cm = 1/100 = 0.01 m

volume = area x height

= 3750 x 0.01

= 37.5 m³

Given cost per cubic metre = Rs. 240:

⇒ total cost = 240 x 37.5 = 9000