The cost of enclosing a rectangular garden with a fence all around at the rate of ₹ 150 per metre is ₹ 54,000. If the length of the garden is 100 m, find the area of the garden.

A rectangular floor which measures 15 m × 8 m is to be laid with tiles measuring 50 cm × 25 cm. Find the number of tiles required. Further, if a carpet is laid on the floor so that a space of 1 m exists between its edges and the edges of the floor, what fraction of the floor is uncovered?

A rectangular garden 10 m by 16 m is to be surrounded by a concrete walk of uniform width. Given that the area of the walk is 120 square metres, assuming the width of the walk to be x, form an equation in x and solve it to find the value of x.

A rectangular room is 6 m long, 4.8 m wide and 3.5 m high. Find the inner surface area of the four walls.