Q: The speed of boat in stagnant water is 9 km/hr and the river is flowing at a speed of 6 km/hr. We left a point and reached a point 30 km upstream and are back at the starting point at 6 p.m. When did we start the journey?
A.
6 am
B.
9 am
C.
12 noon /12 दोपहर
D.
3 pm
Correct Answer:
Option A -
Explanations:
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