Subject :IMO Class : Class 8
A star is 8.1 × 1013 km away from the earth. Suppose light travels at the speed of 3.0 × 105 km per second. How long will it take light from star to reach the earth?
A7.5 × 103 hrs
B7.5 × 104 hrs
C2.7 × 1018 secs
D2.7 × 1011 secs
Ans 1:
Class : Class 8