Saved Bookmarks
| 1. |
19.In a day, how many times the hour hand &minute hand of a clock are at right angles toeach other?(1) 40(3) 48(4) 45 |
|
Answer» 44 Times; This follows logically from the the following1) Between one occurrence of the minute and hour hand alining and the next there will be two times that right angles form2) Between each hour stroke the hands will line up except during the 11:00 to 12:00 period (take 12:00 alinement to be included 12:00 to 1:00)3) In each 12 hour period there are 11 alinements - take two 12 hour periods and two right angles per alignment to find 11⋅2⋅2 = 44hence option 2 |
|