SSC CGL Race and Relative Speed Practice Test 3
15 SSC CGL race and relative speed questions with chapter-wise explanations and exam-style options.
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SSC CGL Race and Relative Speed Practice Test 3
15 SSC CGL race and relative speed questions with chapter-wise explanations and exam-style options.
Preview all 15 questions in SSC CGL Race and Relative Speed Practice Test 3 (no login required)
- Race and Relative Speed
1. A scooter travels 180 km in 4 hours. Speed is:
- A. 40 km/h
- B. 45 km/h (Correct)
- C. 50 km/h
- D. 55 km/h
Explanation: Speed = 180/4 = 45 km/h.
- Race and Relative Speed
2. At 54 km/h, distance covered in 3 hours is:
- A. 152 km
- B. 160 km
- C. 162 km (Correct)
- D. 168 km
Explanation: Distance = speed x time = 54 x 3.
- Race and Relative Speed
3. Time taken to cover 84 km at 28 km/h is:
- A. 2 hr
- B. 3 hr (Correct)
- C. 4 hr
- D. 5 hr
Explanation: Time = distance/speed = 84/28.
- Race and Relative Speed
4. A 210 m train passes a pole in 14 seconds. Speed is:
- A. 12 m/s
- B. 14 m/s
- C. 15 m/s (Correct)
- D. 16 m/s
Explanation: Speed = 210/14 = 15 m/s.
- Race and Relative Speed
5. Two trains move in opposite directions at 48 km/h and 42 km/h. Relative speed is:
- A. 84
- B. 86
- C. 88
- D. 90 (Correct)
Explanation: Opposite directions means speeds add.
- Race and Relative Speed
6. Two trains move in same direction at 66 km/h and 54 km/h. Relative speed is:
- A. 10
- B. 12 (Correct)
- C. 14
- D. 16
Explanation: Same direction means difference of speeds.
- Race and Relative Speed
7. Boat speed in still water is 18 km/h and stream speed is 5 km/h. Upstream speed is:
- A. 11
- B. 12
- C. 13 (Correct)
- D. 14
Explanation: Upstream speed = 18 - 5.
- Race and Relative Speed
8. Boat speed in still water is 18 km/h and stream speed is 5 km/h. Downstream speed is:
- A. 21
- B. 22
- C. 23 (Correct)
- D. 24
Explanation: Downstream speed = 18 + 5.
- Race and Relative Speed
9. A man goes at 24 km/h and returns at 16 km/h. Average speed is:
- A. 18
- B. 19.2 (Correct)
- C. 20
- D. 21
Explanation: Average speed = 2ab/(a+b) = 2 x 24 x 16 / 40 = 19.2.
- Race and Relative Speed
10. 90 km/h is equal to:
- A. 20 m/s
- B. 22 m/s
- C. 25 m/s (Correct)
- D. 27 m/s
Explanation: Multiply by 5/18: 90 x 5/18 = 25.
- Race and Relative Speed
11. 25 m/s is equal to:
- A. 72 km/h
- B. 81 km/h
- C. 90 km/h (Correct)
- D. 100 km/h
Explanation: Multiply by 18/5: 25 x 18/5 = 90.
- Race and Relative Speed
12. Two persons 240 km apart move towards each other at 70 km/h and 50 km/h. They meet after:
- A. 1.5 hr
- B. 2 hr (Correct)
- C. 2.5 hr
- D. 3 hr
Explanation: Relative speed = 120 km/h, time = 240/120 = 2 hours.
- Race and Relative Speed
13. A 180 m train crosses a 270 m platform in 18 seconds. Speed is:
- A. 20 m/s
- B. 22 m/s
- C. 25 m/s (Correct)
- D. 28 m/s
Explanation: Total distance = 450 m, speed = 450/18 = 25 m/s.
- Race and Relative Speed
14. If speed decreases by 20%, time for same distance increases by:
- A. 20%
- B. 22%
- C. 25% (Correct)
- D. 30%
Explanation: New time factor = 1/0.8 = 1.25, so time increases by 25%.
- Race and Relative Speed
15. A 240 m train moving at 72 km/h crosses a man walking at 6 km/h in opposite direction. Time taken is:
- A. 10 sec
- B. 11 sec (Correct)
- C. 12 sec
- D. 13 sec
Explanation: Relative speed = 78 km/h = 65/3 m/s. Time = 240 divided by 65/3 ≈ 11.1 sec, nearest 11 sec.