Question

15. What sum of money will amount to Rs. 690 in 3 years, the rate of Interest being 4%, 5% and
6% during 1st, 2nd and 3rd years respectively?
(a) 500 (b) 400 (c)600 (d) 800 (e) None of these​

Answer 1

Answer:

(c) 600

Step-by-step explanation:

(p/100)(4+5+6) + p=690

p×(3/20) + p = 690

p(23/20) = 690

p = 690*20/23

= 600

Answer 2

Option 'e' is correct.

Step-by-step explanation:

Since we have given that

Principal = Rs. 690

Rate of interest = 4%, 5% and 6%.

So, According to question, we get that

$690=P(1+\dfrac{4}{100})(1+\dfrac{5}{100})(1+\dfrac{6}{100})\\\\690=P(1+0.04)(1+0.05)(1+0.06)\\\\690=P(1.04)(1.05)(1.06)\\\\\dfrac{690}{1.04\times 1.05\times 1.06}=P\\\\P=Rs.\ 596.10$

Hence, option 'e' is correct.

# learn more:

In simple interest what sum amounts of Rs.1120/- in 4 years and Rs.1200/- in 5 years ?

(a) Rs. 500

(b) Rs. 600

(c) Rs. 800

(d) Rs. 900

https://brainly.in/question/4333416