Question

A clock is started at noon. By 10 minutes past 5, the hour hand has turned through
A) 145
B) 155
C) 165
D) 175

Answer 1

$\bf\huge\color{red}{SOLUTION;}$

Angle traced by hour hand in 12 hrs = 360º.

 

Angle traced by hour hand in 5 hrs 10 min.  i.e., 31/6 hrs =
(360/12*31/6)° = 155°

Answer 2

Q:

A clock is started at noon. By 10 minutes past 5, the hour hand has turned through:

A) 145
B) 155
C) 165
D) 175

Answer:   B) 155 

Explanation:

Angle traced by hour hand in 12 hrs = 360º.
 
Angle traced by hour hand in 5 hrs 10 min.  i.e., 31/6 hrs = 36012*316°= 155º