Question

Find thebreadth of a rectangle
if it's length is 30 centimetre and the perimeter is 80 centimetre​

Answer 1

Answer:

2 ( l + b ) = 80

( 2 × 30 ) + ( 2 b ) = 80

60 + 2b = 80

2b = 20

b = 20/ 2

b = 10