Draw a graph #v(t)# for body which is moving 15 min with a velocity of 20km/h. Then this body stops for 5 min and then continue to move again for 10 min with velocity of 25 km/h. What is the average velocity of the body?

1 Answer
A08
May 24, 2016

Graph as below.
#18.dot3km//h#

Explanation:

The graph of #v(t)" Vs "t# is as below

my computer
To calculate average velocity we proceed as follows, after converting time to hours
1. Total time of travel #=30/60=0.5h#
2. Total distance traveled #=20xx15/60+0xx5/60+25xx10/60#
#=5+25/6=55/6km#
3. #"Average velocity"="Total displacement"/"Time of travel"#
#=(55/6)/0.5=55/3=18.dot3km//h#

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