A wooden box 1.5 m long, 1.25 m wide and 65 cm deep and open at the top is to be made. Find the cost of wood required for it, if Rs 30 is the cost of 1 metre square of wood.

A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. Its is opened at the top. Ignoring the thickness of the plastic sheet: determine the area of the sheet requried for making the box.

A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thickness of the plastic sheet, determine: (i) The area of the sheet required for making the box. (ii) The cost of sheet for it, if a sheet measuring 1m^2 costs Rs 20.

A cuboidal oil tin is 50 cm by 30 cm by 40 cm.Find the cost of the tin required for making 20 such tins.If the cost of tin sheet is Rs. 20 per square metre.

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

A conical tent is 10 m high and the radius of its base is 24 m. Find cost of the canvas required to make the tent, if the cost of 1 m^2 canvas is Rs 70.