Question

5.
The length and breadth of a rectangle are in the ratio 4:3. If the diagonal measures 25 cm then the
perimeter of the rectangle is
1) 56 cm
2) 60 cm
3) 70 cm
4) 80 cm​

Answer 1

Answer:

70

Step-by-step explanation:

the diagonal makes a right angle triangle

let l =4x

b=3x

(4x)²+(3x)²= 25²

16x²+9x²=625

25x²=625

x²=25

x=+5. Or x= –5

l=20

b=15

perimeter=2(l+b)

=2(20+15)

=2(35)

=70cm