Question

The length of a rectangle is three times it's width and it's perimeter is 96m.The length is?

Answer 1

Answer:

the length is 36cm

Step-by-step explanation:

let width = x

then length = 3x

perimeter of the rectangle = 2*(l+b)

according to the question:-

2*(3x +x) = 96

2*4x=96

8x =96

x=> 96/8= 12

width = 12cm

the length = 3*12=36cm

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Answer 2

Answer:

length = 36m

Step-by-step explanation:

Perimeter of a rectangle = 2(l+b) [Let the length be l and breadth be b]

=> 96m = 2(3b+b) [Note:The length is 3b cuz it's said that the length is 3 times the breadth]

=> 96m = 6b+2b

=> 96m = 8b

=> 8b = 96m

=> b = 96m/8

=> b = 12m

Now,

According to the question..

l = 3b

=> l = 3(12) = 36m

Therefore, length = 36m

Hope it helps :)