Question 874686
A gardener brought 5 rabbits, after 2 months rabbits became 10, and after 4 months they became 20. If the growth continues on the same ratio, what would be the amount of rabbits after 1 year?
t1 =5
t2=10
t3=20
series will be 
5+ 10 +20 +------ --+13th 
 this series will be GP 
a=5     r= 2 n= 13 
general term = ar^n-1
             = 5. 2^13-1
             =5.2^12
             =5x4096 =20480
 number of rabbits will be = 20480
total rabbit will be sum of GP =a(r^n -1)/r-1
                               = 5(2^13 -1)/2-1
                               = 5(8192-1)/2-1
                               =5x8191 =40955
answer number of rabbit will be after 1 years  =20480 rabbits 
total number of rabbit after 1 year =40955 rabbit