Find the cost of leveling a ground at the rate of Rs 12 per square metre if it is 45 m long and 30 m wide

A path of 1 m wide runs around and inside a square garden of side 20 m. Find the cost of levelling the path at the rate of rs. 2.25 per square metre (in Rs.).

Find the cost of fencing a square park of side 300m at the rate of Rs. 20 per metre.

Find the cost of fencing a square park of side 250 m at the rate of Rs.20 per metre.

Find the cost of fencing a square park of side 250 m at the rate of Rs. 20 per metre.

Find the cost of fencing a square park of side 300m at the rate of Rs.20 per metre.

A tank 20m long, 12m wide and 8m deep is to be made of iron sheet. It is open at the top. Determine the cost of iron-sheet, at the rate of Rs 12.50 per metre, if the sheet is 2.5m wide.