Question

pls ans this fast
sound numerical
pls fast

Answer 1

here, given
distance, d = 45 km = 45000m
and,speed of signal wave, v = 3 x 10^8
now, total distance covered by signal = 2d
(: - the signal reaches plane and returns)
now, we know
v = d/ t
t = d/ v
t = 2 x45000/3 x10^8 = 3 x 10^-4
HOPE THIS HELPS YOU ;-)

Answer 2

hlw mate ur ans
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