Question

Q18. A room is 8 m long and 5 m wide. A square carpet of side 3m is laid on the floor shown in the figure.

1. What is the area of the room?

a) 39m2

b) 40m2

c) 45m2

d) 42m2

2. What is the area of the carpet?

a) 6m2

b) 7m2

c) 8m2

d) 9m2

3. What is the area which is not carpeted?

a) 30m2

b) 40m2

c) 31m2

d) 32m2

4. If rate of the carpet is Rs. 20 per sq. m, then what is the cost of the carpet?

a) Rs. 170 b) Rs. 160 c) Rs. 180 d) Rs. 200

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Answer 1

Answer:

1. length = 8m

breadth = 5m

Area = Length * breadth

Area = 8 * 5

Area = 40m

2. side = 3m

area = side * side

area = 3 * 3

area = 9m

3. not carpeted area = area of room - area of carpet

not carpeted area = 40 - 9

not carpeted area = 31 m

4. area of carpet = 9m

cost of carpet per sq.m = Rs.20

cost of carpet = 9 * 20

= Rs.180