7. The central hall of a school is 22 m long and 15.5 m wide. A carpet is to be laid on the floor leaving
a strip of 75 cm width from the walls uncovered. Find the area of the carpet and the area of the
strip left uncovered.
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Answer:
The area of the hall is 22m x 15.5m = 341 m^2
The carpet is (22 - 2 * 0.75) * (15.5 - 2 * 0.75)
= (22 - 1.5) * (15.5 - 1.5)
= 20.5 * 14 = 287 m^2
The portion uncovered is 341 m^2 - 287 m^2 = 54 m^2
A meter length of carpet is 1 m * 0.82 m = 0.82 m^2
287 m^2 / 0.82 m^2 = 350 m of carpet
350 m * 60Rs / m = 21,000 Rs
Step-by-step explanation:
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