RRB Group D 17-Sep-2018 Shift 1 Solved Paper

Question : 80 of 100

Marks: +1, -0

What is the measure of the smaller of the two angles formed between the hour hand and the minute hand of a clock when it is 6: 51p.m?

Solution:

Here Hour

=06

and Minute

=51

Angle between 12 and the hour hand at 06 :

θ {h} \;\; =\;{60 {H}+ {M}}/{2}

\;\; =\;{60(06)+51}/{2}=\;{411}/{2}=205.5^{∘}

Angle between 12 and the minute hand at

51: θ {\m}=6 {M}=6(51)=306^{∘}

∴

required angle is

306-205.5=100.5^{∘}

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