Question

The perimeter of a rectangle is 42 cm and length is 3 cm less than three times of its breath,find the dimension of the rectangle

Answer 1

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Answer 2

Step-by-step explanation:

perimeter of rectangle = 42cm

3length - 3cm = breath

perimeter of rectangle = 2( l + b)

42 = 2 { l + (3l-3) }

42 = 2 ( 4l - 3 )

42 = 8l - 6

42 + 6 = 8l

48 = 8l

l = 48/8

l = 6cm

b = 3l - 3

b = 3×6 - 3

b = 15cm