Question

The length of a rectangle is decreased by 25% and the width is increased by 40%. Calculate the percentage of change in area. ANSWER ONLY IF YOU KNOW IT.
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Answer 1

Step-by-step explanation:

length be L

breadth be B initially

now length increased by 25%mean l=L+L/4=5L/4

breadth is increased by 40%mean b=B+2B/5=7B/5

AREA=l×b=35LB/20

change in area =35LB/20-LB

=15LB/20

=3/4LB

change=75%