NCHMCT JEE 2011 Question Paper with solutions for online practice

Question : 12 of 198

Marks: +1, -0

A population of a country is 90 crores. If it increases by then 2% in first year and 10% in second year, then what will be the population after second year?

98 crores
100.98 crores
102 crores
105 crores

Validate

Solution:

The population after 1 year = 90 +

{90×2}/{100}

= 90 + 1.8 = 91.8 crore
Again, the population after second year
= 91.8 +

{91.8×10}/{100}

= 91.8 + 9.18 = 100.98 crores.

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