Question

If the length of the rectangle is increasedby40% and its breadt
is decreased-by-40%, what will be the percentage change in its
perimeter?​

Answer 1

Answer:

Conclusion: On increasing the length of a rectangle by 40% and decreasing the breadth by 40%, the perimeter increases by 32.73%.

Step-by-step explanation:

hope this helps you

Answer 2

Step-by-step explanation:

Let the length be 1000cm and breadth be 100cm.

Therefore, Perimeter = 2(l+b)

= 2(1000+100)cm

= 2200cm

A/Q. Length increased by 40%.

Breadth decreased by 40%.

Therefore, New length = 1400cm

New breadth = 60cm

Therefore, New perimeter = 2(l+b)

= 2(1400+60)cm

= 2920cm

Difference in perimeter = 720cm

Therefore, percentage change in perimeter = (720/2200×100)%

= 32.72727272...%

Hence, percentage change in perimeter is 32.72727272...%.