Question

an amount of money invested trebled in 6 years. find the rate of interest earned ?

Answer 1

first tell compound intrest or simple intrest

Answer 2

since the principal trebled

Interest = 2p

$\frac{pnr}{100} = 2p \\ n6 = 200 \\ n = 200 \div 6 \\ n = 33.33 \\ 33 \: years \: \: (app)$