Time and Distance: Test 2

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Time and Distance Test 2: questions and answers

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  1. 1. Convert 72 km/hr into metres per second.
    1. 20 m/s
    2. 259.2 m/s
    3. 35 m/s
    4. 10 m/s

    Reference: q-71b29597-41 · Report this question

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    Answer: A. 20 m/s

    Multiply by 5/18: 72 × 5/18 = 20 m/s.
  2. 2. A car travels at 40 km/hr. How far will it go in 5 hours?
    1. 230 km
    2. 220 km
    3. 200 km
    4. 210 km

    Reference: q-67087a43-58 · Report this question

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    Answer: C. 200 km

    Distance = speed × time = 40 × 5 = 200 km.
  3. 3. A train 360 m long is running at 72 km/hr. In how many seconds will it cross a pole?
    1. 24 seconds
    2. 22 seconds
    3. 18 seconds
    4. 14 seconds

    Reference: q-a2e3ba22-85 · Report this question

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    Answer: C. 18 seconds

    Speed = 72 × 5/18 = 20 m/s. Time = 360 / 20 = 18 seconds.
  4. 4. A train 200 m long is running at 90 km/hr. How long will it take to cross a platform 175 m long?
    1. 15 seconds
    2. 8 seconds
    3. 21 seconds
    4. 24 seconds

    Reference: q-41c600d3-97 · Report this question

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    Answer: A. 15 seconds

    Distance = 200 + 175 = 375 m. Speed = 25 m/s. Time = 375 / 25 = 15 seconds.
  5. 5. A man covers a certain distance at 24 km/hr and returns at 40 km/hr. Find his average speed for the whole journey.
    1. 32 km/hr
    2. 18 km/hr
    3. 34 km/hr
    4. 30 km/hr

    Reference: q-3ec6db12-115 · Report this question

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    Answer: D. 30 km/hr

    For equal distances, average speed = 2xy / (x + y) = 2 × 24 × 40 / 64 = 30 km/hr.
  6. 6. Convert 144 km/hr into metres per second.
    1. 40 m/s
    2. 55 m/s
    3. 30 m/s
    4. 518.4 m/s

    Reference: q-94af245-42 · Report this question

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    Answer: A. 40 m/s

    Multiply by 5/18: 144 × 5/18 = 40 m/s.
  7. 7. A car travels at 85 km/hr. How far will it go in 5 hours?
    1. 420 km
    2. 425 km
    3. 415 km
    4. 430 km

    Reference: q-abcbc33c-58 · Report this question

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    Answer: B. 425 km

    Distance = speed × time = 85 × 5 = 425 km.
  8. 8. A train 630 m long is running at 108 km/hr. In how many seconds will it cross a pole?
    1. 20 seconds
    2. 21 seconds
    3. 18 seconds
    4. 19 seconds

    Reference: q-e7adf126-86 · Report this question

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    Answer: B. 21 seconds

    Speed = 108 × 5/18 = 30 m/s. Time = 630 / 30 = 21 seconds.
  9. 9. A train 390 m long is running at 90 km/hr. How long will it take to cross a platform 160 m long?
    1. 18 seconds
    2. 26 seconds
    3. 15.6 seconds
    4. 22 seconds

    Reference: q-adf4de63-97 · Report this question

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    Answer: D. 22 seconds

    Distance = 390 + 160 = 550 m. Speed = 25 m/s. Time = 550 / 25 = 22 seconds.
  10. 10. A man covers a certain distance at 36 km/hr and returns at 45 km/hr. Find his average speed for the whole journey.
    1. 44 km/hr
    2. 34 km/hr
    3. 40.5 km/hr
    4. 40 km/hr

    Reference: q-4516dabe-115 · Report this question

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    Answer: D. 40 km/hr

    For equal distances, average speed = 2xy / (x + y) = 2 × 36 × 45 / 81 = 40 km/hr.

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