Question

The length of a.rectangle is twice its
breadth. What is the length, if the perimeter is 90 cm

option 1) 30cm 2) 15cm 3) 45cm 4) 10cm​

Answer 1

Answer:

breadth = 2X

length =x

perimeter = 2(l +b)

$2(x + 2x) = 90$

$2 \times 3x = 90$

$6x = 90$

$x = 90 \div 6$

$x = 15$

Answer 2

Answer:

15 cm is the answer.

Step-by-step explanation:

Let breadth be x

Let length be 2x

B/Q 2(2x+x) =90

2×3x=90

3x=90/2

3x=45

x=45/3=15

Therefore the length is 15 cm