Is it advisable to withdraw the amount invested when its value gets at least doubled #shorts

Find the number of years in which an amount invested at 8% p.a. simple interest doubles itself.

Ninad, Vikas and Manav enter into a partnership. Ninad invests some amount at the beginning. Vikas invests double the amount after 6 months and Manav invests thrice the, amount invested by Ninad after 8 months. They earn a profit of Rs. 45000 at the end of the year. What is Manav's share in the profit? R s .9000 b. R s .12000 c. R s .15000 d. R s .2000 e. none of these

Mrs karuna invested some amount in buying Rs. 120 shres of a company which pays a dividend at the rate of 10% per annum. If she gets back 8% per annum on her investment, then the value at which she bought the shares is _________.

A : To a metal wire of diamete d and length L when the applied voltage is doubled, drift velocity gets doubled. R : For a constant votage when the length is doubled, drift velocity will be halved but drift velocity is independent of diameter .

A,B and C started a business with their investments in the ratio 1:2:4 , after 6 monts.A invested the half amount more as before and B invested twice the amount more as before, while C withdraws (1)/( 4) th of their investments. Find the ratio of their profit at the end of the year.