Question

Average speed of ‘A’ during a 20-hour journey is 28 km/h. If he covered the first 240 km of his journey at a speed of 20 km/h, then find the speed at which ‘A’ travelled during the remaining journey.

A 40 km/h
B 30 km/h
C 35 km/h
D 45 km/h
E None of these
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