1.  In how many years, ₹ 150 will produce the same interest @ 8% as ₹ 800 produce in 3 years @ 4% ?
A. 6
B. 8
C. 9
D. 12

Answer: Option C

Explanation:

P = ₹ 800, R = 4% = 9/2%,

T = 3 years, Then,

S.I. = ₹ (800 x 9/2 x 3/100) = ₹ 108.

Now, P = ₹ 150, S.I. = ₹ 108, R = 8%.

Time = 100 x 108 years = 9 years.
150 x 8