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The length of a rectangle is twice its breadth ,the perimeter is 42 cm what is the length and the breadth?

The length of a rectangle is twice its breadth ,the perimeter is 42 cm what is the length and the breadth?
asked 64.2k views
5 votes
The length of a rectangle is twice its breadth ,the perimeter is 42 cm what is the length and the breadth?

asked
User Edmund
by
8.4k points

1 Answer

3 votes
Perimeter = p
length = l
breadth = b
l = 2b
p = 2l + 2b
p = 4b = 2b
p = 6b
42 = 6b
b = 42/6
b = 7
l = 2 x 7
l = 14
answered
User Matthew Steeples
by
7.6k points
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