Exercise 19.1 and the cost of planting grass in it at \( ? 20 \) per \( \mathrm{m}^{2} \)
2. Find the area of a square, whose perimeter and area are in the ratio \( 1: 2 \)
3. The cost of fencing a square field at \( ? 14 \) per metre is 288000 . Find the area of the feld. find the cost of reaping the field at \( ? 15 \) perd are in the ratio 30 : 2 . If the perimeter of the field is 280 a
5. The breadth of a rectangular field is twice its length. If the area of the field is 1058 mi , frod the cont of fencing it at ?35 per m.
6. The length and breadth of a rectangle is 9 m and 7 m respectively. If the perimeter of a squme is as perimeter of rectangle, find the area of the square.
7. A hall is of length 30 m and breadth 20 m . It is surrounded by a 3 m wide verendeh on the cuabide Find the area of the verandah. Also find the number of tiles of dimensions \( 50 \mathrm{~cm} \times 50 \mathrm{~cm} \) which will be required to cover the verandah.
8. A triangular field is of base 24 m and height 15 m . Find the cost of laying grass inside the feld a \( ? 15 \) per square metre.
9. Find the area of the following triangles. Here, \( b \) is base and \( h \) is the height in each case
a)
b)
c)
10. The ratio of base to height of a triangular field is \( 3: 1 \). If the cost of cultivating the feld at \( ? 28 \) per sq. m is \( ? 9450 \), find its base and height.
11. The base of a triangular field is 840 m and its altitude is 550 m . Find the cost of reaping the feld st the rate of ? 2500 per hectare.
