Area and Perimeter Practice Test 3

Question : 21 of 40

Marks: +1, -0

The length of a rectangle is increased by 60%. By how many per cent its breadth will be reduced so that its area remains the same?

Solution:

Let breadth be reduced by x%, then,
60 - x -

{60-x}/{100}

= 0
⇒

x + {3x}/5

= 60
⇒

{8x}/5

= 60
∴ x =

{5×60}/8

= 37.5 %

Go to Question:

Prev Question

Next Question