sinhap07 wrote:
Engr2012 wrote:
baharemustafa wrote:
At exactly what time past 7:00 will the minute and hour hands of an accurate working clock be precisely perpendicular to each other for the first time?
(A)20 13/21 minutes past 7:00
(B)20 13/17 minutes past 7:00
(C)21 3/23 minutes past 7:00
(D)21 9/11 minutes past 7:00
(E)22 4/9 minutes past 7:00
5.5 is the angle between minute n hour, this is what I was taught...so shouldn't it be solve by dividing 90 with 5.5?
(A)20 13/21 minutes past 7:00
(B)20 13/17 minutes past 7:00
(C)21 3/23 minutes past 7:00
(D)21 9/11 minutes past 7:00
(E)22 4/9 minutes past 7:00
5.5 is the angle between minute n hour, this is what I was taught...so shouldn't it be solve by dividing 90 with 5.5?
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