In a 8000 m race around a circular stadium having a circumference of 2000 m, the fastest runner Rohan and the slowest runner Soham starting from the same point and reach the starting point together at the end of the 10th minute, for the first time after the start of the race. If Rohan runs at twice the speed of Soham, what is the time taken by Rohan to finish the race?

A

15 minutes

B

10 minutes

C

20 minutes

D

25 minutes