Question

find the perimeter of length = 40m , length = 10 m, breath = 10 m​

Answer 1

Step-by-step explanation:

Let the length be l and breadth be b

according to the question

l=5b−4

Since ,

Perimeter,

P=2[l+b]

40=2[5b−4+b]

40=12b−8

12b=48

b=4

l=5×4−4

l=20−4

l=16

Therefore Length of the rectangle is 16m