Question

the length and breadth of rectangular room is in ratio of 3:4 and perimeter is 28 what is length​

Answer 1

Answer:

600sq.m

Step-by-step explanation:

Perimeter of rectangle = 100m

ratio of length is to breadth = 3:2 = 3x : 2x

Perimeter = 2(l+b)

P = 2(3x+2x)

= 6x + 4x = 10x

10x = 100 ; x = 100/10 = 10

l = 3x = 3 × 10 = 30 m

b = 2x = 2 × 10 = 20 m

Area of rectangle = length × breadth ( l×b )

A = 30 × 20 = 600 sq.m

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Answer 2

Answer:

2

Step-by-step explanation:

ratio of length and breadth = 3:4

let ratio of length and breadth = 3x ,4x

perimeter of rectangle = 28

2(l+b) = 28

2(3x+4x) = 28

7x = 28/2

7x = 14

x = 14/7

x = 2