Question

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

the 12.0 km drive will be

Answer 1

Step-by-step 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:

`(12)/( (14)/(75) ) = (450)/(7) = 64.3 \: km{h}^( - 1)`