Learn and practice Problems on speed time and distance with easy explaination and shortcut tricks. All questions and answers on speed & distance covered for various Competitive Exams
Solve Problems:
1) A running man crosses a bridge of length 500 meters in 4 minutes. At what speed he is running?
2) A car running at a speed of 140 km/hr reached its destination in 2 hours. If the car wants to reach at its destination in 1 hour, at what speed it needs to travel?
The length of the bridge is equal to the distance covered by the cyclist at a speed of 20 km/hr in 2 minutes.
So, Distance = Speed * Time
Speed = 20 km/hr
Speed in m/s = 20 *5⁄18=100⁄18→50⁄9 m/s
Time= 2 minutes →2 * 60 = 120 seconds
Required distance =50⁄9* 120=6000⁄9= 666.6 meters
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6) Two boys start running at the same time in the same direction at a speed of 10 km/hr and 12 km/hr respectively. In what time they will be 8 km apart?
Both the boys are in motion so we will consider relative speed to find the time.
Relative speed = 12 – 10 = 2 km/hr
Distance = 8 km
Time =8⁄2= 4 hours (Option B)
7) A man walking at a speed of 8 km/hr covers a certain distance in 1 hour 45 minutes. If he runs at a speed of 10 km/hr, in what time he will cover the same distance?
Time = 1 hour 45 minutes = 105⁄60minutes =21⁄12 hrs
Distance = 8 *21⁄12=168⁄12= 14 km
Time required to cover the 14 km at a speed of 10 km/hr = 14/10 = 1.4 hr
Time in minutes = 1.4 * 60 = 84 minutes (Option D)
8) A horse covers a certain distance in 40 minutes if it runs at a speed of 60 km/hr. At what speed the horse can cover the same distance in 30 minutes?
Speed of horse to cover 40 km in 30 minutes or 30⁄60hrs would be:
Speed = 40/(30/60) = 80 km/hr
9) A car moving at a speed of 75 km/hr covers certain distance in 2 hours. If its speed is reduced by 15 km/hr, in what time it will cover the same distance?
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10) At his usual speed a cyclist covers a certain distance in 8 hours. When the speed of cycle is increased by 4 km/hr the same distance can be covered in 6 hours. Find the distance.
