Question

plz tell me the ans with steps​

Answer 1

Okay, we'll use the fundamentals. It's simple.

I will tell you the approach but I suggest you do the calculations yourself otherwise the purpose of the problem will be defeated.

Take the sum equal to a variable say,x.

Now time=t=2..

Final amount will be 4x.

Nows the good part.

You can either use the concept geometrical progressions or you can use the formula.

Taking the formula:(which is actually the application of GP)

A=P(1+r/n)^nt

Now just plug in the values.

Start by dividing by x to eliminate it...

There you go

Answer 2

Answer:Hi there, the simplest rule of thumb for this is just divide the number 72 by the number of years in which the investment will double. If it doubles in 2 year, the the approximate interest rate is 72/2 =36%