Question

length of rectangle is 42 cm more than its breath . if length is 3 cm more than twice its breath the perimetre of new rectangle is 18 cm more .find dimension of original rectangle

Answer 1

let the nreadth of rectangle be x cm then : length = (x+42)cm and also
since when length is 3 cm more than twice it's breadth then in that case l=( 2x +3 )
since perimeter =2 (l+b)
then , 2 (2x+3 + x) = 18 cm
(2x+3+x) = 18/2
( 3x+3 ) = 9
3x= 6
x= 6/3=2.
therefore length =(2x+3)=(2×2+3)=7 cm
and breadth =x=2cm