A car travels from Gwalior to Jhansi at 60 km/hr and returns at 80 km/hr. If the total travel time is 3.5 hours, what is the one-way distance?
120 km
Let the one-way distance be \(d\) km.
Time taken to go \(= \frac{d}{60}\) hours, and time taken to return \(= \frac{d}{80}\) hours.
Total time: \(\frac{d}{60} + \frac{d}{80} = 3.5\).
Taking the LCM of 60 and 80 (=240): \(\frac{4d + 3d}{240} = 3.5 \Rightarrow \frac{7d}{240} = 3.5\).
\(7d = 840 \Rightarrow d = 120\).
Hence, the one-way distance is 120 km.
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Important Questions from Speed Time and Distance
The average speed of a train is 180% of the average speed of a car. The car covers a distance of 990 km in 15 hours. The time taken (in hours) by the train to cover the distance of 891 km is:
If Rohit can cover a distance of 1188 km in 22 hours, then what is the speed of Rohit?
A train is moving at 72 km/hrs. The distance covers in 15 minutes by the train is:
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A person crosses a 1600 m long street in 4 min. What is his speed (in km/h)?
