SOLUTION: A runner runs 80 km per hour after 1 second he was running 90 km per hour what is the average of the runners speed ?

Question 728440: A runner runs 80 km per hour after 1 second he was running 90 km per hour what is the average of the runners speed ?

Found 2 solutions by Lisalovemath, Alan3354:
Answer by Lisalovemath(2) (Show Source): You can put this solution on YOUR website!
First, add both rates of the runners
80+90=170
Then, count the number of rates(this number is very important for the next step).
There are 2.
Now, divide 170 by 2. Dividing the combined rates (170) by the total numbers of rates(2), we will find the average.
170/2=85 kilos per hour.
Thus, the average kph is 85 kph.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A runner runs 80 km per hour after 1 second he was running 90 km per hour what is the average of the runners speed ?
-------------
If the acceleration from 80 to 90 is constant, his average for that 1 second period is 85 km/hr.
------------------------
He's faster than most runners, never seen a human run that fast.
RELATED QUESTIONS
Two runners are needed to get some medicine to a village 22 km away. The first runner... (answered by josgarithmetic)
Convert the speed 90 km per hour of a car to meters per... (answered by ikleyn,josgarithmetic)
A runner starts at the beginning of a runners' path and runs at a rate of 6 miles per... (answered by rfer)
in a stream running at 2 km per hour, a motor boat goes 6 km up stream back again to the... (answered by richwmiller)
Mr Lim drove at 70 km per hour for 1 hour and 30 minutes. He then drove another 55 km. if (answered by Menjax)
A car travels 150 km in 1 hour and 20 minutes. What is the average speed of the car in km (answered by checkley77,mcleo)
a marathon runner runs 26.2 miles in 3.5 hours. One mile is about 1.61 kilomters Whats... (answered by JulietG)
Ed is a runner and he runs a 8 km loop every day.��The first 4 km, he runs at... (answered by jim_thompson5910)
A runner has an initial velocity of 4 meters per second. after 20 seconds, the runners... (answered by ewatrrr)