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              to find the finishing time


              If we know the starting time and the duration of an activity, we can find its finishing
              time.

              example 3: Mr Gupta began his morning jog at 6:15 a.m. and ran for 35 minutes. At

              what time did he finish his jog?

              Solution:

                                     + 30 minutes    + 5 minutes

                                                                                      h min
                   6:00      6:15       6:30      6:45 6:50 7:00
                                                                                      6    15
                Starting time         Duration        Finishing time               +       35
                                                                                      6    50
                  6:15 a.m.         35 minutes          6:50 a.m.



              Mr Gupta finished his jog at 6:50 a.m.


                       Practice time 11f


                1.  Complete the following table.


                                Starting time                  Finishing time                     duration

                    (a)           7:25 a.m.                       9:15 a.m.

                    (b)          11:10 p.m.                                                 1 hour 10 minutes

                    (c)           5:45 a.m.                                                     50 minutes

                    (d)           8:10 p.m.                                                3 hours 25 minutes

                    (e)          10:55 a.m.                                                 1 hour 21 minutes


                2.  An aeroplane  flies  from Chennai  at  8:20  a.m.  and  reaches  Delhi  at  11:05  a.m.

                    How much time does it take to reach Delhi?

                3.  A football match started at 11:30 a.m. and ended at 1:00 p.m. For how long was

                    the match played?

                4.  The annual  Sports  Day started  at  11:30  a.m.  It  ended  by
                    4:45 p.m. What was the duration of the event?

                5.  Siya started making  a project  at 3:30 p.m.  and  finished  it in

                    2 hours 50 minutes. At what time did she finish the project?


              Mathematics-4                                                                                         211
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