Architects design many types of buildings. They draw plans for houses, such as the plan shown in Fig. 9.68: An architect wants to install decorative moulding around the ceilings in all the rooms. The decorative moulding costs ₹500/metre. Find how much moulding will be needed for bed room 1

Solution:

The figure represents the plan for a house.

An architect wants to install decorative moulding around the ceilings in all the rooms.

The decorative moulding costs ₹500/metre.

We have to find the moulding needed for the bed room 1.

From the plan we observe that the bed room 1 is in square shape.

Perimeter of square = 4(side)

Side = 3.04 m

Perimeter = 4(3.04)

=12.16 m

Therefore, the moulding needed for the bed room 1 is 12.16 m.

✦ Try This: A rectangular room is 9 m long and 6 m wide. Find the cost of covering the floor with carpet 2 m wide at Rs 35 per metre.

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 11

NCERT Exemplar Class 7 Maths Chapter 9 Problem 126 (a) (iv)

Architects design many types of buildings. They draw plans for houses, such as the plan shown in Fig. 9.68: An architect wants to install decorative moulding around the ceilings in all the rooms. The decorative moulding costs ₹500/metre. Find how much moulding will be needed for bed room 1

Summary:

Architects design many types of buildings. They draw plans for houses, such as the plan shown in Fig. 9.68: An architect wants to install decorative moulding around the ceilings in all the rooms. The decorative moulding costs ₹500/metre. 12.16 m of moulding will be needed for the bed room 1.

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