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dybincka [34]
3 years ago
5

You drive 6.00 km at 50.0 km/h and then another 6.00kmat 900 km/h Your average speed over

Physics
1 answer:
Cerrena [4.2K]3 years ago
8 0

Explanation:

average speed = total distance travelled / total time travelled

time to travel the first 6km: 6 / 50 = 3/25 (h)

time to travel the next 6km: 6 / 90 = 1/15 (h)

[I think there's problem in the question 'cause 900km/h sounds impossible for normal person to travel in normal condition]

The total time: 3/25 + 1/15 = 14/75 (h)

Average speed over the 12 km drive will be:

\frac{12}{ \frac{14}{75} }  =  \frac{450}{7}  = 64.3 \: km{h}^{ - 1}

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