A courier-person cycles from a town to a neighbouring Suburban area to deliver a parcel to a merchant. His distance from the town at different times is shown by the following graph:

During which period did he ride fastest?

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between 8 am and 9 am he rides fastest.

between 9 am and 10 am he rides fastest.

between 10 am to 10.30 am he rides fastest.

between 10.30 am to 11.30 am he rides fastest.

answer is A.

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Detailed Solution

Given graph,
Question Image

Line graph is used to display data which changes continuously over periods of time.
Note that from 8 am to 9 am distance covered is10 km hence speed is 10 km/hr.
Note that from 9 am to 10 am distance covered is 16-10 = 6 km hence speed is 6 km/hr.
Note that from 10 am to 10:30 am the distance covered is0 km hence speed is 0 km/hr.
Note that from 10:30 am to 11:30 am the distance covered is 22-16= 6 km hence speed is 6 km/hr.
Note that maximum speed 10 km/he is between 8 am to 9 am hence between 8am to 9am he rides fastest.
Hence, option 1 is correct.

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