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    E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_10
                 \ 11-Sep-2024               Surender Prajapati   Proof-5                     Reader’s Sign _______________________ Date __________

                  Observe the relationships between the units of time.

                          1 hour     = 60 minutes                        1 month = 30 days
                          1 day      = 24 hours                          1 year      = 12 months

                          1 week = 7 days                                1 year      = 365 days

                  example 1: Mohit practised cricket for 180 minutes. For how many hours did he play
                  cricket?
                  Solution:  60 minutes               =      1 hour
                                 180 minutes          =      180 ÷ 60 = 3 hours

                  Thus, Mohit practised cricket for 3 hours.
                  example 2: Convert:
                       (a)  6 months into days.                       (b)  7 weeks into days.

                  Solution:  (a) 1 month  =  30 days                  (b)  1 week  = 7 days
                                     6 months  =  30 × 6 days              7 weeks = 7 × 7 days
                                                 =  180 days                          = 49 days

                  example 3: Convert:

                       (a)  8 minutes into seconds.     (b)  4 hours into minutes.  (c)   5 days into hours.
                  Solution:

                       (a)  1 minute    = 60 seconds     (b) 1 hour  = 60 minutes              (c) 1 day   = 24 hours

                            8 minutes = 60 × 8 seconds           4 hours = 4 × 60 minutes          5 days   = 5 × 24 hours

                                                = 480  seconds                  = 240 minutes                  = 120 hours

                           Think and Answer
                        How many hours and minutes are there in the following:

                             1                   1                     1
                         1.     day         2.     day            3.      day
                             2                   3                     4

                           Practice time 10f

                  1.  Write the following dates in two ways:

                       (a)  January 4, 2003             (b)  April 21, 2014              (c)  16.11.2018

                  2.  Convert the following.

                       (a)  2 hours into minutes  (b)  8 hours into minutes              (c)  1 day into hours

                       (d)  1 day into minutes          (e)  5 days into minutes          (f)  19 weeks into days
                       (g)  24 weeks into days          (h)  10 months into days          (i)  4 years into days

                  Mathematics-3                                                                                         187

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