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)b)40 m2

2)d)9m2

3)c)31m2

4)c)Rs 180

Answer 2

Answer:

1) 40 m² 2) 9m² 3) 31m² 4) ₹180

Step-by-step explanation:

area of floor = length × breadth

= 8× 5 = 40m²

area of square carpet = a² = 3² = 9m²

area of non carpet area = 40m² - 9m² = 31m²

rate of carpet = rs 20 per sq. m

cost of carpet = area × rate of carpet

= 9 × 20 = Rs 180