Question

15. The perimeter of a square plot = 360 m. Find :
0 its area
(1) cost of fencing its boundary at the rate of 40 per metre.
(m) cost of levelling the plot at 60 per square metre.
16. The perimeter of a rectangular field is 500 m and its length = 150 m. Find
0 its breadth.
(10) its area
(ii) cost of ploughing the field at the rate of 120 per square metre
17. The cost of flooring a rectangular hall at 7 64 per square metre is 2.048. If the breadin
the hall is 5 m, find :
(0) its length
(1) its perimeter
(m) cost of fixing a border of very small width along its boundary at the rate of 60 per
metre.
18. The length of a rectangle is three times its breadth. If the area of the rectangle is
1875 sq. cm, find its perimeter.​

Answer 1

Answer:

15. Perimeter = 360 m

One side of the square plot = Perimeter/4

=360 / 4

= 90

Area = Side × Side

= 90 × 90

=8100m 2