Delhi Police Constable Exam Model Paper 10

Question : 87 of 100

Marks: +1, -0

If the radius of a circle is increased by 16%, its area increases by

Solution:

Tips & Tricks
Area of circle =

πr^2

, where r is the radius of circle.
When r is increase by 16% then new area =

π × (1.16r)^2= 1.3456 πr^2

% increase in area

= [(1.3456 – 1)/1] × 100 = 34.56

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