Find the rate of simple interest in percent per annum, if a principal becomes `(4)/(9)` part of its amount in a period of time of `20` years.

Find the rate of simple interest in percent per annum if the simple interest of a principal is 3/5 part of the amount in 10 years.

At the same rate of simple interest in percent per annum, if a principal becomes the amount of Rs 1248 in 7 years and or Rs 1056 in 4 years. Find the principal and rate of simple interest in percent per annum.

At the same rate of simple interest in percent per annum, if a principal becomes the amount of 7100Rs in 7 years and of 6200Rs in 4 years. Determine the principal and rate of simple interest in percent per annum.

At the same rate of simple interest in percent per annum, if a principal becomes are amount of Rs 7100 in 7 yrs and of Rs 6200 in 4 yrs, then find the principal and rate of simple interest in percent per annum.

If at the rate of simple interest in percent per annum by which a principal becomes double in 20 years and also amounts to 7Rs20 after 4 years, then find the principal.

At the same rat of simple interest in present per annum, if a principle becosmes the amount of ₹ 7400 in 8 years and of ₹ 6200 in 4 years, then determine the principal and rate of simple intest in percent per annum.

At what rate of simple interest per annum in percent the interest of a principal in 20 years will be (4)/(9) part of its amount ?

At what rate of simple interest in percent per annum , a some of money becomes double in 15 years?

At what rate of simple interest in percent per annum, the ratio of principal and its interest after 20 years is 1:1 ?

If a principal beocmes Rs 560 in 3 years and Rs 600 in 5 years at the same rate of simple interest in percent per annum, then find the principal and the rate of simple interest in percent per annum.