Question

Plz solve the ninth question as fast as possible

Answer 1

Answer:

10 months

Step-by-step explanation:

Installment per month =1,200

number of months =n

let rate of intrest =8/

S.I=P×n(n+1)/2×12×r/100

1200×n(n+1)/2×12×8/100 4n(n+1=Rs(1200×n)+Rs4n(n+1)=(1200n+(4n)square+4n)

Given maturit value=12,400

Then1200n+(4n)squre+4n)=12.440

(4n)squre+1204n-12440=0

(n)squre+301n-3110=0

(n+311)(n-10)=0

therefore. n=-311 or. n=10 months

The months is =10

Answer 2

Answer:

The answer for this question is 10 months.