NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 9: Perimeter and Area - Problems and SolutionsQuestion 125
Class 7 - Mathematics - Unit 9: Perimeter and Area - Problems and Solutions
Question. 125
The plan and measurement for a house are given in Fig. 9.67. The house is surrounded by a path 1 m wide. Find the following: (i) Cost of paving the path with bricks at rate of ₹120 per m². (ii) Cost of wooden flooring inside the house except the bathroom at the cost of ₹1200 per m². (iii) Area of Living Room.
Answer:
(i) ₹ 1116
(ii) ₹ 60600
(iii) 36 m²
Detailed Answer with Explanation:
(i) Area of outer rectangle – area of house = path area. Multiply by cost.
(ii) Floor area – bathroom area = area floored. Multiply by cost.
(iii) Living room area = length × width.