Question

A hall of 15 m by 13 m has a white marble floor. A red carpet is laid in the centre of
the hall leaving 50 cm border area all around. Find the area and perimeter of the
carpet.

Answer 1

Answer:

Dimensions of the white marble floor of the hall:

Length = 15 m

Breadth = 13 m

The width of the border is given as = 50 cm = 0.5 m

Therefore,  the dimensions of the red carpet laid at the centre of the hall:

Length of carpet = 15 – (2*0.5) = 14 m

Breadth of carpet = 13 – (2*0.5) = 12 m

Thus,  the area of the carpet = [Length of carpet] * [Breadth of carpet] = 14 * 12 = 168 m²

And,

The perimeter of the carpet = 2 * [length + breadth] = 2 * [14+12] = 52 m