# Aptitude - Clock - Discussion

Discussion Forum : Clock - General Questions (Q.No. 11)

11.

How many times are the hands of a clock at right angle in a day?

Answer: Option

Explanation:

In 12 hours, they are at right angles 22 times.

In 24 hours, they are at right angles 44 times.

Discussion:

76 comments Page 2 of 8.
Darshan said:
5 years ago

Angle = (11*m)/2 - 30 * h.

Use this formula for solving the clock problem.

Use this formula for solving the clock problem.

Nishtha said:
5 years ago

How 22 right angles in 12 hours?

Deepanjan said:
5 years ago

How many times the two hands of a clock will make 180 degree from 4pm to 10pm?

Pratik said:
5 years ago

Every hour, 2 right angles are formed between the hands. But because minute hand crosses hour hand every 55 mins, every hour, there is a 5-minute lag. For 24 hours, the lag is 24x5= 120 mins i.e. 2 hour lag - a loss of 4 right angles in 24 hours.

So: 24x2 - loss = 44.

So: 24x2 - loss = 44.

(1)

ADITI said:
5 years ago

As for one hour right angle will be two times.

So, the answer is should be 48.

So, the answer is should be 48.

Vivaan said:
6 years ago

Yes, the answer is 44 times. In between 2-3 & 8-9 o'clock, only one 90° angle is formed. Hence, In 12 hrs. No of times 90° angles is formed decreases from 24 to 22. & In a day 44times, 90° angles is formed.

Fact: For any angle, the no of times it is formed in a day is 44 times.

Fact: For any angle, the no of times it is formed in a day is 44 times.

Zips said:
6 years ago

How many times right angle is similar?

Niharika said:
6 years ago

What about the number of times 0 degrees comes in 12 hours (precisely 5am-5pm)?

Shakil said:
6 years ago

When time starts at 12 noon, at 12:15 angle b/w them is 90.

For 1 pm angle subtended by two hands as 90 degrees will twice. Once the minute hand is approaching the hour hand and once it is going away from hour hand. it is similar for 2 pm, but in the case of 3 pm only one time. for second chance it's out of range.

For 1 pm angle subtended by two hands as 90 degrees will twice. Once the minute hand is approaching the hour hand and once it is going away from hour hand. it is similar for 2 pm, but in the case of 3 pm only one time. for second chance it's out of range.

Rasika said:
6 years ago

How many 90 degree angles between the hour hand and minute hand from 12 noon to 3 pm? How to calculate? please explain.

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