Aptitude Day 197

Answers of Day 196:   1. 5.

                                      2. 6(2/3).

Problems on Simple Interest:

1. A sum of money becomes 3/2 of itself in 5 years at a certain rate of simple interest. The rate per annum is:

Solution:

                 Let the sum be x.

                 S.I = 3x/2 – x = x/2

                

                 R = (x/2)*100/x*5

                     = 10%.

2. A lends 5000 to B and a certain sum to C at the same time at 10% p.a. simple interest. If after 2 years, A altogether receives 2500 as interest from B and C, then the sum lent to C is:

Solution:

                 Let the sum lend to C be x.

                 (5000*10*2)/100 + (x*10*2)/100 = 2500

                 1/5[5000+x] = 2500

                 5000+x = 12500

                 x = 7,500.