RPF Constable Time, Speed and Distance — practice questions — page 2

Explore 34 free Time, Speed and Distance questions in RPF Constable Arithmetic. Open each question or exercise to read its content, reference answers and available explanation.

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Time, Speed and Distance questions and exercises with answers

Showing questions 31–34 of 34.

A 120 m train at 54 km/h overtakes a 180 m train moving the same way in 60 s. Slower train’s speed?Read the answer and worked solution →A boat’s still-water speed is 12 km/h. It covers 30 km downstream and 18 km upstream in 4 h. Find the positive stream speed.Read the answer and worked solution →Motion: choose the resultRead the answer and worked solution →Motion: combine the cluesRead the answer and worked solution →

Worked practice questions

A 120 m train at 54 km/h overtakes a 180 m train moving the same way in 60 s. Slower train’s speed?

36 km/h
30 km/h
40 km/h
45 km/h

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Correct answer: A. 36 km/h

Relative speed is (120 + 180)/60 = 5 m/s; the slower train runs at 15 − 5 = 10 m/s = 36 km/h.

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A boat’s still-water speed is 12 km/h. It covers 30 km downstream and 18 km upstream in 4 h. Find the positive stream speed.

3 km/h
2 km/h
1 km/h
4 km/h

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Correct answer: A. 3 km/h

For stream speed x, 30/(12+x) + 18/(12−x) = 4 reduces to x(x−3)=0; the positive solution is 3 km/h.

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Motion: choose the result

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Matching pairs

Left
72km/h in m/s
Right
20 m/s
Left
12m/s in km/h
Right
43.2 km/h
Left
18km at6km/h:time
Right
3 h
Left
Opposite15,10m/s;120+180m:time
Right
12 s
Left
Still10,stream2;24km each way
Right
5 h
Left
A12m/s;beatsB30m over180m:Bspeed
Right
10 m/s

Instructions

Speeds are in km/h unless marked m/s.

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