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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
9.43 Area of the Four Walls of a Room - III

Example:
The total area of the four walls of a hall is 216 square metres. Its height is 8 metres. If the floor of the hall is in the shape of square, find the area of the floor.

Solution:
Given that,
Total area of the four walls (A) = 216 square metres.
Height (h) = 8 metres.
Equation for the above problem A = 4lh
Now l = A/4h
l = 216/(4*8) = 6.75 metres
Each side of the floor = 6.75 metres.
Therefore, area of the floor = 6.75 * 6.75
= 45.5625 square metres.


Directions: Read the above example carefully and answer the following questions:
  • The total area of the four walls of a hall is 28x sq units. Its height is x units. If the floor of the hall is in the shape of a square, find the area of the floor.
    (Answer:- 49 square metres)


Q 1: The total area of the four walls of a hall is 516 square metres. Its height is 6 metres. If the floor of the hall is in the shape of square, find the area of the floor.
462.25 square metres
462 square metres
452.25 square metres
450 square metres

Q 2: Find the total area of the four walls of a hall if, its height is 5 metres and one side of the square floor is 17.5 metres.
306 square metres
350 square metres
206.25 square metres
None of these

Q 3: The total area of the four walls of a hall is 346 square metres. Its height is 6 metres. If the floor of the hall is in the shape of square, find the area of the floor.
402.063 square metres
303.062 square metres
203.063 square metres
None of these

Q 4: The area of the floor of a hall, which is in the shape of a square is given by 126.563 square metres. If the height is 5 metres, then find the area of the four walls of the hall.
215 square metres
225 square metres
216 square metres
None of these

Question 5: This question is available to subscribers only!

Question 6: This question is available to subscribers only!


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