Question

The percentage change in the area of a rectangular field,if it's length is increased by 40% and breadth is decreased by 10%,is --

Answer 1

Answer:

40 - 10 -((40*10)/100)

=30 -(400/100)

=30 - 4  

=  26% increase.  answer

Step-by-step explanation:

l = 100

b = 100

a = 100*100 = 10000

after change

 l = 100*140/100 = 140

b 100*90/100 = 90

so area = 140*90 = 12600

so diference 12600 - 10000 = 2600

so. (2600*100)/10000 = 260000/10000

=.  26% (answer)