Q. From 1 O' clock afternoon upto 10 O' clock in the night, the hands of a clock will be at right angle ______ Times.
✅ Correct Answer: (C)
18
Explanation: Time period from 1 O' clock afternoon to 10 O' clock night = (10 - 1)h = 9 h
As we know, hands are at right angle 2 times in an hour.
Hence, in 9 h they will be at right angle 9 × 2 = 18 times
Explanation by: Madhu
Time period from 1 O' clock afternoon to 10 O' clock night = (10 - 1)h = 9 h
As we know, hands are at right angle 2 times in an hour.
Hence, in 9 h they will be at right angle 9 × 2 = 18 times
As we know, hands are at right angle 2 times in an hour.
Hence, in 9 h they will be at right angle 9 × 2 = 18 times