NCHMCT JEE 2018 Question Paper with solutions for online practice

Question : 14 of 200

Marks: +1, -0

A man cycles from A to B, a distance of 21 km in 1 hour 40 min. The road from A is level for 13 km and then it is uphill to The man’s average speed on level is 15 km/hr. Find his average uphill speed.

9 km/hr
10 km/hr
11 km/hr
12 km/hr

Validate

Solution:

Time taken to cover distance 13 km

=\text "Distance"/\text "Speed"=13/15

hrs.

=13/15×60=52

minutes
Remaining time

= 100-52 = 48

minutes
Remaining distance

= 21 - 13 = 8

km
Time taken to cover distance 8 km = 48 min

=48/60hrs=4/5hrs

\text "Speed"=\text "Distance"/\text "Time"={8/4}/{5}

={8×5}/4=10

km/hr

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