Q. 655.0( 1 Vote )

# The following is the time-distance graph of Sneha’s walking.A) When does Sneha make the least progress? Explain your reasoning.B) Find her average speed in km/hour.

A) From the graph we can say that , Sneha made the least progress from the interval 25 minutes to 40 minutes.

We see that initially , she is travelling approximately 0.5km in 10min , 0.25km in 5min , till the first 25 mins. But after 25 mins, her speed decreased as she travelled 0.25km in 15min.

We can say that because of her speed in that interval i.e. = = 1km/hr which the lowest among all.

B) As we know that ,

Average speed = = = = × 60 = 2.18km/hr.

Average speed = 2.18km/hr.

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