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We know that Area under the Speed time graph gives us the distance travelled by the body.
Time from 10:20 am to 10:40 am = 20 min
= 20/60 hr
= 1/3 hr
= 1/3 hr
By looking at the graph
Speed = 45 Km / h
Distance = Area = 45 × 1/ 3
= 15
= 15 km
Hope the solution is clear to you!!
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