Clock – Railway Reasoning

Total Questions: 37

11. If the number 1 on the clock is replaced by the letter 'M', the number 2 is replaced by 'N' and so on, then when the time is 21 : 00 p.m. the hour hand will be at ___________ letter. [RRB ALP Tier - I 09/08/2018 (Afternoon) ]

Correct Answer: (d) U
Solution:

In the 12 hour clock 21:00 means 9pm.

12. How many times in a week does both the hands of the clock will coincide with each other? [RRB ALP Tier - I 13/08/2018 (Afternoon)]

Correct Answer: (a) 154
Solution:

The hands of the clock will coincide once in every hour. Therefore, in 1 day or 24 hours, hands will coincide 24 times. And in 7 days, 22 × 7 = 154

13. In a week, how many times are the hands of a clock at right angles with each other ? [RRB ALP Tier - I 21/08/2018 (Morning)]

Correct Answer: (a) 308
Solution:

we know that, The hands of a clock will make a right angle 22 times in 12 hours
⇒ And will make a right angle 44 times in 24 hours.
⇒ Will make a right angle 308 times in a week.

14. What would be the smaller of the two angles formed by the hour hand and the minute hand at 3 : 47 p.m.? [RRB ALP Tier - I 21/08/2018 (Afternoon)]

Correct Answer: (a) 168.5°
Solution:

Short trick : Angle between the hands of clock is given by :Required angle formed by the two hands of clock at 3 : 47 p.m.

15. How many times are the hour and the minute hands of a clock at a right angle in a period of two days? [Group - D 18/08/2022 (Morning)]

Correct Answer: (a) 88
Solution:

Hour hand and the minute hand of a clock at a right angle = 44 times a day.
Hence, the correct answer is 44 × 2 = 88

16. How much angular distance will be covered by the minute hand of a correct clock in a period of 3 hours 10 minutes? [Group - D 22/08/2022 (Evening)]

Correct Answer: (d) 1140°
Solution:

Angle moved by minute hand in 1 minute = 6°
Therefore, angle moved by clock in 190 minutes or 3hr 10 minutes
= 6° 190 = 1140°

17. What is the angular distance covered by the second hand of a correct clock in 12 minutes? [Group - D 23/08/2022 (Morning)]

Correct Answer: (c) 4320⁰
Solution:

Angular distance traveled by second hand in 1 minute = 360⁰
Angular distance traveled by second hand in 12 minute = 12 × 360⁰ = 4320⁰

18. If the time in the mirror image of a 12-hour clock is 3 : 55, what is the actual time? [Group - D 25/08/2022 (Morning)]

Correct Answer: (a) 8 : 05
Solution:

On subtracting the given time 3 : 55 by 11 : 60, we get 8 : 05.

19. Find the approximate angle between the minute hand and the hour hand of a 12-hour clock when the time is 9 : 25. [Group - D 25/08/2022 (Afternoon)]

Correct Answer: (d) 130°
Solution:

Formula to calculate angle is:
𝐴𝑛𝑔𝑙𝑒 𝑓𝑜𝑟𝑚𝑒𝑑 = 30 ℎ −11m/2 where, h is value of hours, m is value of minutes,
According to formula,

20. At what time between 2 o'clock and 3 o'clock the hands of a clock will be together? [Group - D 26/08/2022 (Evening)]

Correct Answer: (d)
Solution:

Use the following formula to solve this type of question.
Time = 60 × 𝑀/11 (Minute)
⇒ (Where m means the value of the lesser hour of the two times between which it is being determined.)