1.

Distance of the moon from the earth is \[\text{4 }\times \text{ 1}{{0}^{\text{8}}}\] m. The time taken by a radar signal transmitted from the earth to reach the moon is

A.  5.2 s
B.  1.3 s  
C.  2.6 s
D.  0.70 s
Answer» C.  2.6 s


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