General Aptitude: Speed, Time and distance

 Speed, Time, and Distance:

Speed: Speed is a very basic concept in motion which is all about how fast or slow any object moves.

Speed is defined as speed as distance divided by time.

Distance = Speed × Time

It means that:

(i) Distance is directly proportional to ‘Speed’ when ‘Time’ is constant.

• If the ratio of the distance covered by A and B at same time is a: b, then the ratio of the speed of A and B = a: b

(ii) Distance is directly proportional to ‘Time’ when ‘Speed’ is constant.

• If the ratio of the distance covered by A and B with the same speed is a: b, then the ratio of the times taken by then = a: b

(iii) Time is inversely proportional to Speed when ‘Distance’ is constant.

Important Time and Distance Conversions:

• 1 km = 1000 meters
• 1 meter = 100 cm
• 1 hour = 60 minutes
• 1 min = 60 seconds
• 1 yard = 3 feet
• 1 mile = 5280 feet
• 1 hours = 3600 seconds
• 1 mile = 1760 yards

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