Question

4. In how many years a principal amount will be 3 times at 10% simple rate of
interest :
(a) 12 yrs.
(b) 15 yrs. (c)20 yrs. (d) 22 yrs.
In an Arm60/oldi​

Answer 1

Answer:

20yrs

Step-by-step explanation:

RT=100(n-1)

Answer 2

Answer:

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Step-by-step explanation:

we know that  

A=p(1+RT/100) --------- (1)

Here

P = principle = 1

A = total amount = 3 (ATQ)

R = rate of interest=10

find time T = ?

put the values in equation (1)

3=1(1+10T/100)

3=(100+10T)/100

300=100+10T

10T=300-100=200

T=200/10=20

therefore T= 20 year's