Question

a sum of rs.5000 was lent at 6% per annum and rs.6000 at 7% per annum simple interest after what time would the interest become rs.1080 ?

Answer 1

Answer:

1.5 years

Step-by-step explanation:

let, time= t

5000*6*t/100= 300t

6000*7*t/100= 420t

total 300t + 420t = 1080

or, 720t = 1080

or, t = 1080/720 =1.5