Practice Time, Distance & Speed MCQs for PPSC Computer Operator (BS-14) Mathematics — topic-wise sets with solved answers.
Q1. According to a timetable, a coach was due to leave a station at 22:55 and arrive at its destination at 06:05 the next day. How long was the journey?
Answer: 7 hours 10 minutes
Explanation: The correct value is 7 hours 10 minutes. Apply the formula or arithmetic step shown in the question and
Q2. The speed of a boat in upstream is 60 kmph and the speed of the boat downstream is 80 kmph. Find the speed of the boat in still water and the speed of the stream?
Answer: 70 kmph and 10 kmph
Explanation: Still-water speed = (80+60)/2 = 70 km/h; stream speed = (80−60)/2 = 10 km/h.
Q3. A boat running downstream covers 24 km's in 4 hours while for covering the same distance upstream it takes 6 hours whats the speed of the boat in still water?
Answer: 5 km/hr
Explanation: The correct value is 5 km/hr. Apply the formula or arithmetic step shown in the question and
Q4. A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform:
Answer: 240
Explanation: Train speed = 54 km/h = 15 m/s; train length = 20 × 15 = 300 m; (platform + train) = 36 × 15 = 540 m → platform = 240 m.
Q5. Two trains are moving in opposite directions 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is_________?
Answer: 48
Explanation: Relative speed = 150 km/h = 125/3 m/s; total length = 2000 m; time = 2000 ÷ (125/3) = 48 seconds.
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