At what angle the hands of a clock are inclined at 15 minutes past 5?
A. $$58{\frac{1}{2}^ \circ }$$
B. $${64^ \circ }$$
C. $$67{\frac{1}{2}^ \circ }$$
D. $$72{\frac{1}{2}^ \circ }$$
Answer: Option C
Solution(By Examveda Team)
$$\eqalign{ & {\text{Angle}}\,{\text{traced}}\,{\text{by}}\,{\text{hour}}\,{\text{hand}}\,{\text{in}}\,\frac{{21}}{4}\,{\text{hrs}} \cr & = {\left( {\frac{{360}}{{12}} \times \frac{{21}}{4}} \right)^ \circ } = 157{\frac{1}{2}^ \circ } \cr & {\text{Angle}}\,{\text{traced}}\,{\text{by}}\,{\text{min}}{\text{.}}\,{\text{hand}}\,{\text{in}}\,15\,{\text{min}} \cr & = {\left( {\frac{{360}}{{60}} \times 15} \right)^ \circ } = {90^ \circ } \cr & \therefore {\text{Required}}\,{\text{angle}} \cr & = {\left( {157\frac{1}{2}} \right)^ \circ } - {90^ \circ } \cr & = 67{\frac{1}{2}^ \circ } \cr} $$Join The Discussion
Comments ( 1 )
Related Questions on Clock
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. $${\text{197}}{\frac{1}{2}^ \circ }$$
A clock is started at noon. By 10 minutes past 5, the hour hand has turned through:
A. 145º
B. 150º
C. 155º
D. 160º
A. $$59\frac{7}{{12}}$$ min. past 3
B. 4 p.m.
C. $$58\frac{7}{{11}}$$ min. past 3
D. $$2\frac{3}{{11}}$$ min. past 4
the answer is incorrect....:( .The correct answer is 64.5...:)...plse make sure its been corrected :)