Question

The length of a rectangle increased by 40% and the breadth decreased by 30%.
What would be the change in the area?
a) Increase by 10% b)Decrease by 10%
c)Decrease by 2% d)Increase by 2%

Answer 1

Answer:

LET lenght be l and breadth b

Area = lb

New length = 140/100l = 1.4l

New brradth = 70/100b = 0.7b

New area = 0.98lb

Change in area = lb - 0.98lb = 0.02lb

Percentage change in area = 0.02lb/lb × 100 = 2% decrease

THEREFORE, option c

Step-by-step explanation: