NCHMCT JEE 2021 Question Paper with solutions for online practice

Question : 85 of 200

Marks: +1, -0

The population of a state is 20000 . It increases by

20 \%

during the first year and

30 \%

during the second year. The population after two years will be

Solution:

Population after two years

=20000(1+\;{20}/{100})(1+\;{30}/{100})

=20000 × \;{120}/{100} × \;{130}/{100}

=2 × 120 × 130=31200

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