ISSB - PAF Officer Selection Mathematics Speed Distance — Set 2

Speed Distance MCQs set 2 for ISSB - PAF Officer Selection Mathematics — 20 solved questions.

ISSB - PAF Officer Selection Mathematics Speed Distance — Set 2

  1. Question 1

    Q1. Train 150 m crosses pole in 15 s. Speed:

    • A) 8 m/s
    • B) 10 m/s
    • C) 12 m/s
    • D) 15 m/s

    Answer: 10 m/s

    Explanation: Speed equals 150 divided by 15, which is 10 m/s. Work each step carefully; ISSB math rewards accuracy under time pressure.

  2. Question 2

    Q2. Half distance at 40, half at 60. Average:

    • A) 48
    • B) 50
    • C) 52
    • D) 54

    Answer: 48

    Explanation: Equal distances: average is 2ab/(a+b) = 2*40*60/100 = 48 km/h. Work each step carefully; ISSB math rewards accuracy under time pressure.

  3. Question 3

    Q3. A is 50% faster than B. B takes 12 hours. A takes:

    • A) 6
    • B) 8
    • C) 9
    • D) 10

    Answer: 8

    Explanation: If A is 1.5 times as fast, A takes 12/1.5 = 8 hours.

  4. Question 4

    Q4. Two equal trains pass in 10 s at 20 m/s relative. Length of one:

    • A) 50 m
    • B) 100 m
    • C) 150 m
    • D) 200 m

    Answer: 100 m

    Explanation: Relative distance is two lengths. 20 times 10 equals 200, so one length is 100 m.

  5. Question 5

    Q5. A runs at 10 m/s. Time for 1 km:

    • A) 50 s
    • B) 100 s
    • C) 150 s
    • D) 200 s

    Answer: 100 s

    Explanation: 1000 meters at 10 m/s takes 100 seconds. Work each step carefully; ISSB math rewards accuracy under time pressure.

  6. Question 6

    Q6. A car travels 180 km in 3 hours. Average speed?

    • A) 50 km/h
    • B) 60 km/h
    • C) 54 km/h
    • D) 72 km/h

    Answer: 60 km/h

    Explanation: Speed equals distance divided by time so 180 divided by 3 is 60.

  7. Question 7

    Q7. Train 90 km/h for 2.5 hours covers?

    • A) 200 km
    • B) 225 km
    • C) 250 km
    • D) 180 km

    Answer: 225 km

    Explanation: Distance equals speed times time so 90 times 2.5 is 225 km.

  8. Question 8

    Q8. A man walks 5 km/h for 3 h then 4 km/h for 2 h. Total distance?

    • A) 21 km
    • B) 23 km
    • C) 25 km
    • D) 27 km

    Answer: 23 km

    Explanation: First leg 15 km plus second leg 8 km gives total 23 km.

  9. Question 9

    Q9. Boat speed 12 km/h in still water, stream 4 km/h. Downstream speed?

    • A) 8 km/h
    • B) 12 km/h
    • C) 16 km/h
    • D) 48 km/h

    Answer: 16 km/h

    Explanation: Downstream speed is boat speed plus stream so 16 km/h. Work each step carefully; ISSB math rewards accuracy under time pressure.

  10. Question 10

    Q10. Relative speed of two trains 60 km/h and 40 km/h same direction?

    • A) 20 km/h
    • B) 50 km/h
    • C) 100 km/h
    • D) 2400 km/h

    Answer: 20 km/h

    Explanation: Relative speed same direction is difference 60 minus 40 equals 20. Work each step carefully; ISSB math rewards accuracy under time pressure.

  11. Question 11

    Q11. A cyclist goes 15 km upstream in 3 h, stream 2 km/h. Speed in still water?

    • A) 5 km/h
    • B) 6 km/h
    • C) 7 km/h
    • D) 8 km/h

    Answer: 7 km/h

    Explanation: Upstream speed 5 km/h equals boat minus 2 so still water speed is 7.

  12. Question 12

    Q12. Speed 72 km/h for 2.5 h. Distance?

    • A) 160 km
    • B) 180 km
    • C) 200 km
    • D) 220 km

    Answer: 180 km

    Explanation: Distance equals 72 times 2.5 which is 180 km. Work each step carefully; ISSB math rewards accuracy under time pressure.

  13. Question 13

    Q13. Train 108 km in 1.5 h. Speed?

    • A) 60 km/h
    • B) 72 km/h
    • C) 80 km/h
    • D) 90 km/h

    Answer: 72 km/h

    Explanation: Speed equals 108 divided by 1.5 which is 72 km/h. Work each step carefully; ISSB math rewards accuracy under time pressure.

  14. Question 14

    Q14. Upstream speed 8 km/h, stream 2 km/h. Boat speed still water?

    • A) 6 km/h
    • B) 8 km/h
    • C) 10 km/h
    • D) 12 km/h

    Answer: 10 km/h

    Explanation: Still water speed equals upstream plus stream so 10 km/h. Work each step carefully; ISSB math rewards accuracy under time pressure.

  15. Question 15

    Q15. Relative speed opposite 50 and 30 km/h?

    • A) 20 km/h
    • B) 50 km/h
    • C) 80 km/h
    • D) 15 km/h

    Answer: 80 km/h

    Explanation: Opposite directions add speeds so 80 km/h. Work each step carefully; ISSB math rewards accuracy under time pressure.

  16. Question 16

    Q16. Car 60 km/h, after 2 h turns back 40 km/h for 1 h. Total distance?

    • A) 160 km
    • B) 140 km
    • C) 120 km
    • D) 100 km

    Answer: 160 km

    Explanation: First leg 120 km plus return 40 km equals 160 km total path.

  17. Question 17

    Q17. Man runs 400 m in 50 s. Speed m/s?

    • A) 6 m/s
    • B) 7 m/s
    • C) 8 m/s
    • D) 10 m/s

    Answer: 8 m/s

    Explanation: Speed equals 400 divided by 50 which is 8 m/s. Work each step carefully; ISSB math rewards accuracy under time pressure.

  18. Question 18

    Q18. Train 72 km/h for 2.5 hours. Distance?

    • A) 160 km
    • B) 180 km
    • C) 200 km
    • D) 220 km

    Answer: 180 km

    Explanation: Distance equals speed times time so 72 times 2.5 is 180 km.

  19. Question 19

    Q19. Car 90 km/h for 40 minutes. Distance?

    • A) 50 km
    • B) 55 km
    • C) 60 km
    • D) 65 km

    Answer: 60 km

    Explanation: Forty minutes is 2/3 hour so 90 times 2/3 equals 60 km.

  20. Question 20

    Q20. Two trains 50 km/h and 70 km/h opposite direction. Relative speed?

    • A) 10 km/h
    • B) 20 km/h
    • C) 120 km/h
    • D) 60 km/h

    Answer: 120 km/h

    Explanation: Opposite directions add speeds so 50 plus 70 equals 120 km/h. Work each step carefully; ISSB math rewards accuracy under time pressure.