on a treadmill, daisy walks a distance of 2km she then doubles the speed of the treadmill and jogs for another 2 km, if the total time she spent on the treadmill is 1h,find the speed at which she walks and jogs.
Can anyone please show me the right way solving this problem?? Actually I have solve it na but I am not so sure about it..
Can anyone please show me the right way solving this problem?? Actually I have solve it na but I am not so sure about it..
Answers & Comments
Answer: Therefore, Daisy walks at a speed of 6km/h
and she jogs at the speed of 3km/h
Or she jogs at 6km/h and walks at 3km/h
Step-by-step explanation: Let x be the speed Daisy walks.
When Daisy doubles the speed(jogs),the speed becomes 2x
Time taken is 1h, so 3x=1h
3x is the total speed of the treadmill.
so 1h=60 minutes
x=60/3
=20minutes walking
speed of Daisy walking:
= distance/time
=2/20
=0.1km/min
to change to hour:
0.1x60mintues(1h)=6km/h
The time Daisy jog is:
2x=20x2
=40minutes
Speed of Daisy jogging:
=distance/time
=2/40
=0.05km/min
To change it to an hour:
0.05x60minutes(1h)
=3km/h
Therefore, Daisy walks at a speed of 6km/h
and she jogs at the speed of 3km/h
Or opposite
Wait I'll double-check it again rq