- Speed, Time and Distance:
Speed = Distance , Time = Distance , Distance = (Speed x Time). Time Speed - km/hr to m/sec conversion:
x km/hr = x x 5 m/sec. 18 - m/sec to km/hr conversion:
x m/sec = x x 18 km/hr. 5 - If the ratio of the speeds of A and B is a : b, then the ratio of the
the times taken by then to cover the same distance is 1 : 1 or b : a. a b - Suppose a man covers a certain distance at x km/hr and an equal distance at y km/hr. Then,
the average speed during the whole journey is 2xy km/hr. x + y
1. A man complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km
2. If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:
3. A car travelling with of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.
4. A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is:
5. A train can travel 50% faster than a car. Both start from point A at the same time and reach point B 75 kms away from A at the same time. On the way, however, the train lost about 12.5 minutes while stopping at the stations. The speed of the car is:
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