Question

1.Two cross roads, each of width 5 m, run at right angles through the centre of a rectangular

park of length 70 m and breadth 45 m and parallel to its sides. Find the area of the roads. Also

find the cost of constructing the roads at the rate of 105 per m2.



2.A room is 4.5 m long and 4 m wide. The floor of the room is to be covered with tiles of size 15

cm by 10 cm. Find the cost of covering the floor with tiles at the rate of 4.50 per tile.​

Answer 1

Answer:

Answer for Question 1

Let the two crossroads be EFGH and PQRS

For rectangle EFGH

Length = 70m

Breadth = 5m

Area of EFGH = Length × Breadth

= 70m × 5m

= 350m²

For rectangle PQRS

Length = 45m

Breadth = 5m

Area of PQRS = Length × Breadth

= 45m × 5m

= 225m²

Area of Square WXYZ = Side × Side

= 5m × 5m

= 25m²

Area of crossroads = Area of EFGH + Area of PQRS - Area of square WXYZ

= 350m² + 225m² - 25m²

= 550m²

Total Cost = 550m² × ₹105

= ₹57750

SORRY , I am not able to give the answer of 2nd question