Q4. How much distance will Shilpa cover in 5 hours if she drives at 80 kmh she covers the samedistance in 4 hours, what is the speed at which she drove? if she covered the same distance at50 km/h, how much time will she take?
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Answer:
As speed increases, time taken decreases in same proportion. So the time taken and varies inversely to the speed of the vehicle for the same distance.
80
60
=
4
x
60×x=80 and 4÷x=y
60×4=80×x x=
60
80
x=
80
60×4
=3 hr 4÷
60
80
=y
y=
80
4×60
=3 hr
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