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A man invested Rs 8400 at the rate R% on SI for two years and gets a total interest of Rs. 2016. If he invested Rs. 600 more amount on half of the previous rate of interest for two years, then find the interest get by man?

a

960 Rs.

b

840 Rs.

c

1080 Rs.

d

1020 Rs.

e

1040 Rs.

Answer : Option C

Explanation :

R = $frac{{2016 imes 100}}{{8400 imes 2}}$

R = 12%

New rate = $frac{{12}}{2} = 6{ m{\% }}$

interest = $frac{{left( {8400 + 600} ight) imes 6 imes 2}}{{100}}$

= 1080 Rs.