Question

what happened to the area of rectangle if length and breadth become thrice

Answer 1

let A be area of rectangle , L be the length of rectangle and w be breadth of the rectangle ,then

A=LXW

A= 2LX2W

therefore the area of rectangle is increased by four times

or is increased by factor of 4

Answer 2

original length=l

original breadth=b

original area =l×b=a


thrice it's length=3l

thrice it's breadth =3b

area=3l×3b=9l×b=9a




hence area becomes 9 times if the original.



hope it helps u...