Question

A car travels from town A to town B, a distance of 120 km, at x km/h. It returns from B to A at (x + 20) km/h. The total time taken for the round trip is 5 hours. What is the value of x?

A 60 km/h
B 10 km/h
C 40 km/h
D 20 km/h
E None of these
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