1.  A leads ₹ 2500 to B and a certain sum to C at the same time at 7% p.a. simple interest. If after 4 years, A altogether receives ₹ 1120 as interest from B and C, then the sum lent to C is:
A. ₹ 700
B. ₹ 1500
C. ₹ 4000
D. ₹ 6500

Answer: Option B

Explanation:

Let the sum lent to C be ₹ X. Then,

2500 x 7 x 4 + X x 7 x 4 = 1120
100 100

<=> 7X /25 = (1120 - 700)

<=> ₹ (420 x 25) / 7 = ₹ 1500