Clocks and Calendar - Clock Problem: This concept revolves around the calculation of the angular distance traversed by the different hand of the clock. The different hands of the clock move with different speed.The hour hand takes 12 hours to traverse an angle of 360 degree, and the minute hand completes one rotation in one hour i.e. it covers in 1 hour .
Speed of minute hand = in 1 hour ( 60 min )
= per minute
Speed of hour hand = in 12 hours
= in 1 hour ( 60 min )
=
As they are moving in the same direction
So, the relative speed of minute hand over hour hand will be difference of their speeds
Illustration: At what time immediately after 2 o' clock, do the hands of clocks coincide?
A. 10 minutes 11 seconds. B. 10 minutes 10 seconds. C. 10 minutes 55 seconds. D. 9 minutes 55 seconds.
Answer: C
Solution: At 2 o'clock, the hands of the clock are apart.
The minute hand covers this at a speed of
per minute.
To cover , time required = 1 min
TO cover , time required
minutes
If we convert minutes to seconds, it is equal to
= 55 seconds (approx)
So, the answer is 10 minutes 55 seconds.
At what time immediately after 4 o' clock, do the hands of clocks coincide? | |||
Right Option : D | |||
View Explanation |
At what time between 4 and 5 o'clock will the hands of a watch point in opposite directions? | |||
Right Option : D | |||
View Explanation |
At what time immediately before 3 o' clock, do the hands of clocks coincide?
| |||
Right Option : C | |||
View Explanation |
My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
It has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Being a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
My experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.