Soal SMA · Soal cerita · Kesulitan 4/5

A car travels from town A to town B at an average speed of 60 km/h and returns at 40 km/h. What is the average speed for the whole trip?

A.48 km/h
B.50 km/h
C.45 km/h
D.52 km/h

Kunci jawaban & pembahasan

Jawaban: 48 km/h

Harmonic mean: 2×60×40/(60+40)=4800/100=48 km/h.

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