Question

4. A square and a
width of the rectangle is 12 cm, find the length of
12. A rectangular hall is 16 m long and 12 m wide. How many marble slabs of size
25 cm x 15 cm are needed to cover the floor of the hall?
Find the cost of carpeting the room with a carpet​

Answer 1

12) Length of rectangular hall = 16 m = 1600cm

Breadth of rectangular hall=12m = 1200cm

Area of rectangular hall = lenght × breadth

$1600 \times 1200 cm\\ = 1,920,000cm {}^{2}$

lenght of one slab = 25 cm

breadth of one slab = 15 cm

Area of one slab = length × breadth

$25 \times 15cm \\ = 375cm {}^{2}$

No . of slabs required = Area of rectangular hall ÷ Area of one slab = 1920000cm ² ÷ 375cm²

= 5120 cm²