pls solve and send the answer... send step by step explanation also
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as area of speed time graph give total distance .
key point is only that time is given is min in the graph and we have to change it in hour.
so
total distance=area of graph=1/2 ×b×h
=1/2×(20min) ×(40 km/hr)
=1/2×(20/60 hr)×(40km/hr)
=20/3 km
now
avg. speed = total distance /time
= (20/3)/ (20/60)
=20 km/hr
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