Rain swims in an 80 in long pool. He covers 160 m in one minute by swimming from one end to the other and back, along the same straight path. Find his average speed.

A

2.07 $$ms^{-1}$$

B

2.60 $$ms^{-1}$$

C

3.67 $$ms^{-1}$$

D

2.67 $$ms^{-1}$$