alleryA car must cover 120 km in 2 h. After 40 km at 40 km/h, required speed?
A100 km/h
B80 km/h
C60 km/h
D90 km/h
Answer & Solution
Correct answer: B. 80 km/h
The first 40 km takes 1 hour, leaving 80 km to cover in 1 hour at 80 km/h.
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