Question

if rupees 64 amount to rupees 83.20 in 2 year what will rupees 86 amount to in 4 year at the same rate per cent per annum​

Answer 1

Answer:

137.60

Step-by-step explanation:

P  

1

​

=Rs.64

A  

1

​

=83

T  

1

​

=2

Let Rate be R.

A=P(1+  

100

RT

​

)

⇒83.2=64(1+  

100

2R

​

)

⇒  

64

83.2

​

=1+  

100

2R

​

 

∴  Rate =15%

Now,  

         P  

2

​

=86

         T  

2

​

=86

         R=15%

A=P(1+  

100

RT

​

)

⇒A=86(1+  

100

15×4

​

)

⇒A=137.60