A box of constant volume `c` is to be twice as long as it is wide. The material on the top and four sides cost three times as much per square metre as that in the bottom. What are the most economic dimensions?

A box of constant volume c is to be twice as long as it is wide.The material on the top and four sides cost three xx as much per square metre as that in the bottom.What are the most economic dimensions?

A carpet is 30 m 75 cm long and 80 cm wide. Find its cost at Rs 150 per square metre.

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 closed box (cuboid) with a square base is to have a volume 2000c.c, The material for the top and bottom of the box is to cost Rs 3 per square cm and the material for the sides is to cost Rs 1.50 per square cm. If the cost of the material is to be least find the dimension of the box.

The volume of a closed square based rectangular box is 1000 cubic metre. The cost of constructing the base is 15 paise per square metre and the cost of constructing the top is 25 paise per square metre. The cost of constructing its sides is 20 paise per square metre and the cost of constructing the box is Rs. 3.Find the dimensions of box for minimum cost of construction.

The volume of a closed square based rectangular box is 1000 cubic metre. The cost of constructing the base is 15 paise per square metre and the cost of constructing the top is 25 paise per square metre. The cost of constructing its sides is 20 paise per square metre and the cost of constructing the box is Rs. 3.Find the dimensions of box for minimum cost of construction.

The cost of flooring a rectangular room is Rs. 5698. The rate of flooring is Rs. 37 per square metre. If the room is 14 metres long, what is the breadth of the room?

A room is in the shape of a square of side 4m. Calculate the area of the floor. What is the cost of tiling the floor at the rate of ₹ 24 per square metre?