Question

the length and breadth of rectangle are in the ratio 3:2. if its perimetre is 1m40cm . find its dimensions

Answer 1

Answer:

Its dimensions are l=42cm and b=28cm

Step-by-step explanation:

Given, l:b=3:2

And perimeter, p=1m 40cm, ie=140cm(100cm+40cm)

Let 'x' be a constant. [:.l=3x & b=2x]

:.2(l+b) =140

2(3x+2x) =140

2*5x =140

10x =140

x =140/10

x =14

:. Length = 3x = 3*14 = 42cm

Breadth = 2x =2*14 = 28cm

.... Not sure?....

We can check....

We were given 2(l+b)=140

= 2(42+28) [we got l=42 & b=28]

= 2*70

= 140

... Thats our answer...