Question

A principle becomes twice of its amount in 10 years at a certain rate of simple interest, At the same rate of simple interest, that principle becomes thrice of its amount in (A) 15 years (B) 20 years (B) 25 years (D) 30 years​

Answer 1

Answer:

Amount = 2p, Principal = p, Interest = ?

Interest = 2p – p = p

P = p, r = ?, t = 10 and I = p

P = p, r = ?, t = 10 and I = pSince,

P = p, r = ?, t = 10 and I = pSince,⇒ r = 10 %

Answer 2

Answer:

20 years is the correct answer.