the angle between the minute hand and hour of a clock when..., Rances & Games of Skill, General Mathematics

Question:The angle between the minute hand and the hour hand of a clock when the time is 4.20, is :

A 80^° 
B 75^° 
C 60^° 
D 105^°

/59

+ AnswerB

+ ExplanationAngle traced by min. hand in `17/2` hrs` = (360/12 xx 17/2)^°`

                              `= 255^°`

Angle traced by min. hand in 30 min.`= (360/60 xx 30)^°`

                                  `= 180^°`

:. Required angle` = (255 - 180)^°`

                           `= 75^°`

+ Report

Descriptive on Rances & Games of Skill Ebook

Total Preview: 857