A car travels 30jkm at 40km h and form the nst 30km it travels at 20km h what ismits avg. Speed
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Answer:
average speed = 180/4.99=36.07km/hr
Explanation:
average speed = distance travelled /time taken
we know here speed and distance is given only so to find average speed we need to find its time
speed=ditance/time
30=40/t
t=40/30=1.33hr
similarly
36=60/t
t=60/36=1.66hr
and
40=80/t
t=80/40=2hr
now add distance travelled and time taken and divide them
40+60+80=180km
time=1.33+1.66+2=4.99hr
average speed = 180/4.99=36.07km/hr
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