Question

David invested 500000 partly at the rate of 10% per annum andpartly 15% per annum.at the end of year his total income was 60000.what was the amount he invested at the rate of 10% per annum​

Answer 1

Answer:

3,00,000

Step-by-step explanation:

Let X be the sum he invested at 10%

So definitely 500000-X will be the sum invested at 15%

Now,

According to question:-

10% of X + 15% of (500000-X) = 60,000

X/10 + 15/100* 500000- 15X/100 = 60,000

X/10+ 75000-15x/100= 60,000

75000-60000= 15X/100-X/10

15000=(15X-10X)/100

15000= 5X/100

X= 15000*100/5

X= 3000*100

X= 300000

So it means he invested 3,00,000 at 10% p. a

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