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 family room
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 family room.
From the plan we observe that the family room is in rectangular shape.
Perimeter of rectangle = 2(length + breadth)
Length = 4.57 m
Breadth = 5.48 m
Perimeter = 2(4.57 + 5.48)
= 2(10.05)
= 20.10 m
Therefore, the moulding needed for the family room is 20.10 m.
✦ Try This: If it costs Rs.320 to carpet a square room 8 metres broad, what would it cost, at the same rate per square metre, to carpet an oblong room 6 metres by 5 metres?
☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 11
NCERT Exemplar Class 7 Maths Chapter 9 Problem 126 (a) (i)
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 family room
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. 20.10 m of moulding will be needed for the family room.
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