Question

The length and breadth of a rectangular room are in the ratio 3:2.if the length is 8m40cm,find the area of the room.if the floor is to be covered with a carpet 1m40cm wide,find the cost of the carpet at rs.25per metre.​

Answer 1

Step-by-step explanation:

square of 563

$69 \times \frac{?2}{?22}$

in 36

Answer 2

Answer:

Length = 8 m 40 cm = 840 cm

Let length be 3x and breadth be 2x.

⇒ 3x = 840

⇒ x = 840 ÷ 3 = 260 cm

By substituting value of x in breadth,

2x = 2 × 260 = 520 cm

Area of rectangle = length × breadth

⇒ 840 × 520 = 4,36,800 cm²

Length of carpet = 1 m 40 cm = 140 cm

Area of carpet = Area of room

Area of carpet = length × breadth

⇒ 436800 = 140 × length

⇒ length = 436800 ÷ 140 = 3120 m

∴ Cost of carpet at ₹25 per metre = 3120 × 25 = ₹78,000

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