Question

The banker'* discount on Rs. 1800 at 12% per annum is equal to the true discount on Rs. 1872 for the same time at the same rate. Find the time.

Answer 1

*.I. on Rs. 1800 = T.D. on Rs. 1872.

P.W. of Rs. 1872 is Rs. 1800.

Rs. 72 is *.I. on Rs. 1800 at 12%.

Time =[(100 x 72)/ (12 x 1800)]year 1/3 year = 4 months.