Question

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 . f8nd the area of the carpet and the area of the srtip left uncovered.

Answer 1

Total Area of the hall = Length * Width
                                = 22 * 15.5 = 341 m²

75cm = 75/100 m = 0.75m

Since the margin is on both the sides we will subtract it twice,
Area of the carpet = Length * Width
                              = (22 - 0.75 - 0.75) * (15.5 - 0.75 - 0.75)
                              = 20.5 * 14 = 287 m²

Uncovered Area = Total Area - Area of the carpet
                           = 340 - 287 = 53m²

Total Carpet required = 287 m²