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A truck goes from Haryana to Bangalore with an average speed of 60 km/hr. The journey takes 30 hours. It returns from Bangalore to Haryana on the same road with an average speed of 40 km/hr. What was the average speed of the truck during the roundtrip?

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Important Questions on Time,Speed and Distance

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Two rockets approach each other, one at 42,000 mph and the other at 18,000 mph. They start 3256 miles apart. How far are they apart (in miles) 1 min before impact?
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A thief is noticed by a policeman from a distance of 200 m. The thief starts running and policeman chases him. The thief and the policeman run at the rate of 10 kmph & 11 kmph respectively. What is the distance between them after 6 min?
EASY
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IMPORTANT
A and B walk around a circular path of circumference 1,000 m. A walks at 150 m/min and B at 100 m/min. When will they be together anywhere else on the circular path?
EASY
Agniveer Vayu
IMPORTANT
A and B walk around a circular path of circumference 1,000 m. A walks at 150 m/min and B at 100 m/min. When will they be together if they walk in the opposite directions?
HARD
Agniveer Vayu
IMPORTANT
A and B walk around a circular path of circumference 1,000 m. A walks at 150 m/min and B at 100 m/min. C also decides to run with A and B on the circular track. C runs at the speed of 125 m/min in the same direction as that of A and B. When will A, B and C meet at any other point on the track?
MEDIUM
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When the distance between a policeman and a thief is 150 meters, the policeman starts chasing the thief. The policeman runs at a second of 18m/s and catches the thief after 25 seconds. What was the speed of the thief?
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Agniveer Vayu
IMPORTANT

A car is stolen at 4 a.m. The thief drives it towards north at a speed of 50 km/h. The theft is discovered at 4:30 a.m. and a police jeep is set towards north at 60 km/h. At what time will the jeep will overtake the car?

MEDIUM
Agniveer Vayu
IMPORTANT
Two cyclists start from the same place in opposite directions. One goes towards north at 18 km/h and the other goes towards south at 20 km/h. What time will they take to be 47.5 km apart?