Question

Find the number of right angles turned through by the hour hand of a clock when it goes from 1 to 10

Answer 1

the answer is 3 because 3 hours make 1 right angle so from 1 to 10 there is 3 set of 3 hours

Answer 2

I'm assuming you mean the number of times it is formed between the hour hand and minute hand between 1 pm and 10 pm .all the times when a right angle is formed:

1:20

1:50

2:25

2:55

3:00

3:30

4:05

4:35

5:10

5:40

6:15

6:45

7:20

7:50

8:25

8:55

9:00

9:15

they may not be the exact times but 90° angles will be formed twice in an hour so there will be 18 times a right angle is formed