Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 173 - Math_Genius_V1.0_C2_Flipbook
P. 173

    E:\Working\Focus_Learning\Math_Genius_2_(09-10-2023)\Open_Files\Chap_10
                   \ 16-Feb-2024  Bharat Arora   Proof-6                                    Reader’s Sign _______________________ Date __________

                  CloCk                                                Rohan, do you know            To read the time
                                                                         how to read the           correctly, you must
                  Rohan’s mother is buying a beautiful                 time on the clock?         know about the clock.

                  wall clock for her house.

                  A clock tells us the time. It has two

                  hands— a longer hand and a shorter

                  hand. The longer hand is called the

                  minute hand and the shorter hand is

                  called the hour hand. The face of the

                  clock is called its dial. The dial of the                                  I have learnt
                                                                                            reading time in
                  clock is divided into 12 equal divisions,                              complete hours only.
                  marked with numbers 1 to 12 on it.

                  Reading Time when Minute Hand is at 12

                  In the first clock shown here, the hour hand is at 5                        11  12  1         11  12  1
                  and the minute hand is at 12. We say that the time is                     9 10     2 3      9 10     2 3

                  5 o’clock or 5:00.                                                        8  7  6  5  4     8  7  6  5  4

                  We know that the hour hand takes one hour to move

                  from one number to the next. If it has gone from 5 to
                  6, it means one hour has passed.

                  In one hour, the minute hand when completes one round around the dial, the hour

                  hand moves from 5 to 6. Thus, the times is 6 o’clock or 6:00.

                  Understanding Time of Morning or Evening

                  Rohan usually has breakfast around 7 o’clock                                    We use

                  in the morning. And he does self study about 7                    10 11  12  1  2  a.m.  –  From midnight
                                                                                                        to noon
                  o’clock in the evening. How will we understand                   9         3    p.m.  –  From noon to
                                                                                    8       4           midnight
                  here that the clock is showing the time in the                      7  6  5

                  morning or evening?

                  To overcome this confusion, we use a.m. (Ante

                  meridiem) and p.m. (Post meridiem).
                  Thus, Rohan’s breakfast time is 7:00 a.m. and his self study time is 7:00 p.m.

                  Mathematics-2                                                                                         171

| 168 169 170 171 172 173 174 175 176 177 178 |