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In one and a half hours, the minute hand of a clock rotates through an…

In one and a half hours, the minute hand of a clock rotates through an angle of

A.
90^o
B.
180^o
C.
640^o
D.
450^o
E.
540^o

Correct Answer: Option E

Explanation

1 hr, = 60 mins, 60 mins = 360o
30 mins = (frac{360^o}{1}) c (frac{30}{60})
= 180o
90 mins = 360 + 180o
= 540o