Discussion of Question with ID = 149 under Clocks-and-Calendars

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Question

How many hours are there between 9::45 A.M. to 3::36 P.M.

A

5::51.

B

7::50.

C

3::50.

D

7::53.

Soln.
Ans: a

Minutes from 9::45 A.M. to 10::00 A.M. are 60 - 45 = 15. Minutes from 10::00 A.M. to 12::00 noon are 60 X 2 = 120 mins. Minutes from 12::00 noon to 3::36 P.M. are 60 x 3 = 180 + 36 = 216 mins. So total minutes are 15 + 120 + 216 = 351 minutes, which are equal to 60 X 5 + 51 Thus, hours are = 5, and minutes = 51


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