Question

A rectangle has a breadth of 6cm.
The length is 6cm less than the breadth.Write N expression for the perimeter of the rectangle​

Answer 1

Answer:

l=b+6

2l+2b=60

2(b+6) + 2b = 60

2b+ 12 + 2b =60

4b +12 =60

4b=60–12

4b=48

b=48/4 =12

l=12+6 =18

area =l x b = 12 x 18 =216

A bit of a long winded way but shows the method to those not so comfortable with formulas etc