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The reflex angle between the hands of a clock at 10.25 is:

A. 180º

B. $${\text{192}}{\frac{1}{2}^ \circ }$$

C. 195º

D. $${\text{197}}{\frac{1}{2}^ \circ }$$

Answer: Option D

Solution(By Examveda Team)

Angle traced by hour hand in $$\frac{{125}}{{12}}$$ hrs
$$\eqalign{ & = {\left( {\frac{{360}}{{12}} \times \frac{{125}}{{12}}} \right)^ \circ } \cr & = 312{\frac{1}{2}^ \circ } \cr} $$
Angle traced by minute hand in 25 min
$$\eqalign{ & = {\left( {\frac{{360}}{{60}} \times 25} \right)^ \circ } \cr & = {150^ \circ } \cr} $$
$$\eqalign{ & \therefore {\text{Reflex angle}} \cr & = {360^ \circ } - {\left( {312\frac{1}{2} - 150} \right)^ \circ } \cr & = {360^ \circ } - 162{\frac{1}{2}^ \circ } \cr & = 197{\frac{1}{2}^ \circ } \cr} $$

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Comments ( 1 )

  1. Ayush Roy
    Ayush Roy :
    2 years ago

    Good question.

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