Question

what is the simple interest on rs 1080 for 4 years at the rate of 10% in how many years will the interest on rs 900 amount to the same at the rate of 12% per annum​

Answer 1

Answer:

let principle =900

time. =4 years

rate of interest = r

simple interest = ptr/100

amount= 1080

according to the problem,

900×4×r/100=1080

r= 30%

next,

principle= p

time=5 years

rate of interest = 30% ( given same interest)

ptr/100=1275

p×5×30%/100=1275

3p/2=1275

3p=1275×2

3p=2250

p=2250/3

p=850