Question

A car travels 6.0 km along a main road in 6.0 minutes. It then travels 2.0 km along a minor road in 6.0 minutes. Which calculation of average speed for the whole journey is correct?

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A
8.0÷12.0=0.67 km/minute
B
12.0÷8.0=1.57 km/minute
C
8.0+12.0=20 km/minute
D
8.0×12.0=96 km/minute
Solution
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Total distance traveled is 8+2 km
Total time taken is 6+6 min
Average speed is =812=23=0.67 km/min

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