Question

in how much time will simple interest equal the principal under 12½% per annum

pls tell fast​

Answer 1

Answer:

let the sum be Rs.a

It double at the rate of 12 1/2% means total amount received is 2x

Therefore the interest amount received is 2a - a= Rs.a

Hence, Principal =a, Rate of Interest = 25/2%, Interest received = a

We know that SI = PNR/100

Therefore N = (SI x 100)/(PR) = (a x 100)/a x 25/2)= 8 years