Question

5x + 7y = 17 ; 7x + 5y = 19 then vlau of x + y = ?

option
1. 4

2. 2

3. 1

4. 7​

Answer 1

Answer:

₹35640.

Step-by-step explanation:

Amount borrowed = Principal= ₹26400= P Rate=15%p.a =r Time =t=2 years 4 months =2 4/12 =2 1/3 =7/3 years . Amount to be paid for principal compounded yearly = P(1+ r/100)^t So Amount she shall pay at the end of 2 years 4 months to clear the loan =26400(1+15/100)^7/3 =26400(1+ 15/100(7/3) [this approximation is binomial theorem which. implies (1+x)^n can be approximated as 1+nx where x is very much less than 1] =26400(1+35/100) =26400(1.35)= ₹35640.