Question

A man invested Rs30, 000 in two types of bonds. On one he earns 5% and on the other he gets 7%.If his total earnings are Rs2000, find his investment in each type of bond

Answer 1

Let him invest Rs. "x" in bond 1. So, he invests Rs. 30000-x" in bond 2. We know : 
           $\frac{5x}{100} + \frac{7(30000-x)}{100} =2000 \\ \\ \frac{5x}{100}+ \frac{210000-7x}{100} =2000 \\ \\ -2x +210000= 200000 \\ \\ 2x= 10000 \\ \\ x=Rs. 5000$
and y = Rs. 25000
So, the man invested Rs. 5000 in Bond 1 and Rs. 25000 in Bond 2.

Answer 2

Answer:

Step-by-step explanation:

Let him invest Rs. "x" in bond 1. So, he invests Rs. 30000-x" in bond 2. We know :

\frac{5x}{100} + \frac{7(30000-x)}{100} =2000 \\ \\ \frac{5x}{100}+ \frac{210000-7x}{100} =2000 \\ \\ -2x +210000= 200000 \\ \\ 2x= 10000 \\ \\ x=Rs. 5000

and y = Rs. 25000

So, the man invested Rs. 5000 in Bond 1 and Rs. 25000 in Bond 2.