Exercise 20a
1. find the area of the rectangle whose dimensions are:
length = 24.5 m, breadth = 18 m

(ii) length = 12.5 m, breadth = 8 dm.
2.find the area of a rectangular plot, one side of which
rectangular plot, one side of which is 48 m and its diagonal is 50 m.
3.the sides ol a rect
angular park are in the ratio 4: 3. if its area is 1728 m", find the cost of
fencing it at 30 per metre.
4.area of a rectangular field is 3584 m2 and its length is 64 m. a boy runs around
field at the rate of 6 km/h. how long will he take to go 5 times around it
5. a verandah is 40 m long and 15 m broad. it is to be paved with stones, each measuring 6
dm by 5 dm. find the number of stones required.
6. find the cost of carpeting a room 13 m by 9 m with a carpet of width 75 cm at the rate of
3105 per metre
7. the cost of carpeting a room 15 m long with a carpet of width 75 cm at 80 per metre 18
19200. find the width of the room.
8.the length and breadth of a rectangular piece of land are in the ratio of 5: 3. if the total cost
of fencing it at 24 per metre is 9600, find its length and breadth.