Question

Find the number of right angles turned through by hour hand of a clock , when it goes from

$5to11$

Answer 1

Explanation:

The angle covered when the hour hand of a clock $={180}^0$

The hour hand of a clock revolves by $180°$ of $2$ right angles when it goes from $5$ to $11$, we move $6$ hours. i.e.$\frac{1}{2}$ revolution, that is $2$ right angles.

So,number of right angles or ${90}^0$covered $=\frac{{180}^0}{{90}^0}=2$

Hence,the number of right angles covered is $2$.