Latest Elitmus Aptitude Question SOLUTION: In a certain planet in a clock there was 18 hours in stead of 12. So what would be the angle between hour hand and minute hand when the time is 15:50; Sorry forgotten the options

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In a certain planet in a clock there was 18 hours in stead of 12. So what would be the angle between hour hand and minute hand when the time is 15:50;
Sorry forgotten the options

Asked In Elitmus Malaya Prasad Lenka (8 years ago)

Unsolved Read Solution (7)

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Read Solution (7) :

shravan kumar jha  (8 years ago)

In new system-
Minute hand covers 360 degree in 90 minutes (18 x 5) .
Hence, Minute hand covers 4 degree ( 360/90) per minute.

Hour hand covers 360 degree in 18 hours.
Hence, hour hand covers 20 degree (360/18) per hour.
OR, Hour hand covers 2/9 degree (20/90) per minute.

Now time is - 15 : 50
The Minute hand would have covered a total of 200 degree (50 x 4) in 50 minutes.
Similarly , The hour hand would have covered a total of 311.12 minutes [15 x 20 + 50 x (2/9) ] .

Hence the angle b/w the hands is 311.12 - 200 = 111. 12 degree.

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ABHINAV TIWARI  (8 years ago)

In new system hour hand covers 360 degrees in 18 hours.
So 15hr covers 300 degrees [(360/18)*15]

Also minute hand covers 360 degrees in 60 min{since minute hand system is not mentioned in the question)
So minute hand covers 300 degrees in 50 min.[(360/60)*50]

So the angle between the hands is 0 degrees.

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siddharth prakash singh  (8 years ago)

ans will be 10000/9 degree

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siddharth prakash singh  (8 years ago)

sorry misprinted it will be 1000/9 degree

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Vandit Jain  (8 years ago)

185° is d answer

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Tarun Sharma  (8 years ago)

answer would be 350/3 degrees

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Digesh Singh Bisht  (1 year ago)

@Shravan How can u say Minute hand covers 360 degree in 90 minutes ???
it is not mentioned anything about minutes.
We have to use 60 minutes if nothing is given.

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