Question

what will be the area of rectangle if its:
(1) length is doubled and breadth remains is the same.
(2) length remains the same and breadth is doubled.
(3) length and breadth both are doubled.

Answer 1

area of rectangle= l*b
1)length is double, breadth same
so area= (2l)*b=2lb= 2 times its original area.
2)area =(l)*(2b)=2lb= 2 times its original area.
3)area= (2l)*(2b)=4lb=4 times its original area