Shiva borrowed Rs 800 at 6 p a amp Rs 1200 at 7 p a for the same duration He had to pay Rs 1584 in a...........

Quantitative Aptitude (CDS) Simple Interest

Shiva borrowed Rs. 800 at 6% p.a. & Rs.1200 at 7% p.a. for the same duration. He had to pay Rs.1584 in all as interest. Find the time period.

Interest for 1 year at first-rate =800×6×1/100

=Rs.48

Interest for 1 year at second rate =1200×7×1/100

=Rs. 84

Therefore, total interest for 1 year=Rs.132

Hence, the required time=1584/132=12 years.

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