Measurement of Time and Motion Part 3: MCQs (Q51–Q75)

📘 Chapter 8 – Measurement of Time and Motion

🔹 Part 3: Time-Speed Relationship (Q51–Q75)

Q51. The formula for speed is:

A) Speed = Time ÷ Distance
B) Speed = Distance ÷ Time
C) Speed = Distance × Time
D) Speed = Time × Acceleration

✅ Answer: B) Speed = Distance ÷ Time

Explanation: Speed is the distance covered in unit time.

Q52. The formula for time is:

A) Time = Speed ÷ Distance
B) Time = Distance ÷ Speed
C) Time = Distance × Speed
D) Time = Acceleration ÷ Distance

✅ Answer: B) Time = Distance ÷ Speed

Q53. The formula for distance is:

A) Distance = Speed ÷ Time
B) Distance = Speed × Time
C) Distance = Time ÷ Speed
D) Distance = Speed² × Time

✅ Answer: B) Distance = Speed × Time

Q54. A car moves with a speed of 60 km/h for 2 hours. Distance travelled = ?

A) 30 km
B) 60 km
C) 90 km
D) 120 km

✅ Answer: D) 120 km

(Distance = Speed × Time = 60 × 2 = 120 km)

Q55. A train covers 300 km in 5 hours. Its speed is:

A) 50 km/h
B) 60 km/h
C) 70 km/h
D) 80 km/h

✅ Answer: B) 60 km/h

Q56. A runner covers 400 m in 80 s. His speed is:

A) 2 m/s
B) 4 m/s
C) 5 m/s
D) 6 m/s

✅ Answer: B) 5 m/s

(400 ÷ 80 = 5 m/s)

Q57. A cycle travels at 10 m/s for 5 minutes. Distance covered = ?

A) 50 m
B) 500 m
C) 3000 m
D) 600 m

✅ Answer: C) 3000 m

(5 minutes = 300 s; Distance = 10 × 300 = 3000 m)

Q58. If a bus travels 45 km in 90 minutes, its speed is:

A) 20 km/h
B) 25 km/h
C) 30 km/h
D) 40 km/h

✅ Answer: C) 30 km/h

(90 min = 1.5 h; Speed = 45 ÷ 1.5 = 30 km/h)

Q59. A scooter covers 60 km in 2 hours. If speed is doubled, time required is:

A) 4 hours
B) 2 hours
C) 1 hour
D) 30 minutes

✅ Answer: C) 1 hour

Q60. A train travels at 90 km/h. Time taken to cover 180 km = ?

A) 1 hour
B) 1.5 hours
C) 2 hours
D) 2.5 hours

✅ Answer: B) 2 hours

(180 ÷ 90 = 2 h)

Q61. A man walks at 5 km/h. Time to cover 20 km = ?

A) 2 hours
B) 3 hours
C) 4 hours
D) 5 hours

✅ Answer: D) 4 hours

(20 ÷ 5 = 4 h)

Q62. A cyclist covers 600 m in 2 minutes. Speed = ?

A) 5 m/s
B) 10 m/s
C) 15 m/s
D) 20 m/s

✅ Answer: A) 5 m/s

(600 ÷ 120 = 5 m/s)

Q63. A car travels 240 km in 4 hours. Its speed is:

A) 40 km/h
B) 50 km/h
C) 60 km/h
D) 70 km/h

✅ Answer: C) 60 km/h

Q64. If time is kept constant and distance increases, speed will:

A) Increase
B) Decrease
C) Remain same
D) None

✅ Answer: A) Increase

Q65. If speed is constant and time increases, distance will:

A) Increase
B) Decrease
C) Stay same
D) Become zero

✅ Answer: A) Increase

Q66. If distance is fixed and speed increases, time will:

A) Increase
B) Decrease
C) Stay same
D) None

✅ Answer: B) Decrease

Q67. Speedometer shows:

A) Total distance
B) Instantaneous speed
C) Average speed
D) Acceleration

✅ Answer: B) Instantaneous speed

Q68. Odometer shows:

A) Speed
B) Distance covered
C) Time
D) Acceleration

✅ Answer: B) Distance covered

Q69. A runner runs 100 m in 12.5 seconds. Speed = ?

A) 6 m/s
B) 8 m/s
C) 10 m/s
D) 12.5 m/s

✅ Answer: B) 8 m/s

(100 ÷ 12.5 = 8 m/s)

Q70. A motorbike moves at 72 km/h. Convert to m/s.

A) 10 m/s
B) 15 m/s
C) 20 m/s
D) 25 m/s

✅ Answer: C) 20 m/s

(72 × 1000 ÷ 3600 = 20 m/s)

Q71. A bus covers 150 km in 3 hours. Average speed = ?

A) 40 km/h
B) 45 km/h
C) 50 km/h
D) 60 km/h

✅ Answer: D) 50 km/h

Q72. Which of the following can be zero even when distance travelled is not zero?

A) Speed
B) Distance
C) Displacement
D) Time

✅ Answer: C) Displacement

(When object returns to starting point, displacement = 0 but distance ≠ 0)

Q73. A train travels 60 km in 30 minutes. Its speed = ?

A) 60 km/h
B) 90 km/h
C) 100 km/h
D) 120 km/h

✅ Answer: D) 120 km/h

(30 min = 0.5 h; Speed = 60 ÷ 0.5 = 120 km/h)

Q74. If a car travels 20 m/s, in 2 minutes it will cover:

A) 100 m
B) 500 m
C) 2000 m
D) 2400 m

✅ Answer: D) 2400 m

(2 min = 120 s; Distance = 20 × 120 = 2400 m)

Q75. The correct relationship between distance, speed, and time is:

A) Distance = Speed ÷ Time
B) Speed = Distance × Time
C) Distance = Speed × Time
D) Time = Distance × Speed

✅ Answer: C) Distance = Speed × Time

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