# Clocks- Aptitude Questions and Answers - in Hindi

 A clock is started at 6 O' clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 11 O' clock in the morning ? सुबह 6 बजे घड़ी एक घड़ी शुरू होती है। जब घड़ी सुबह 11 बजे दिखाती है तो घंटे का कांटा कितने डिग्री घूमेगा । A) 140° B) 180° C) 150° D) 160° Correct Answer : 150° Explanation :From 6 to 11, there are 5 hours. Angle traced by the hour hand in 6 hours = 5*(360/12) = 150° Or The angle traced of the hour hand = 0.5 * (60*H + M)° Angle traced by the hour hand in 5 hour = 0.5 * (60*5 + 0)= 150° Post/View Answer Post comment Cancel Thanks for your comment.! Write a comment(Click here) ...
 An accurate clock shows 8 o’clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 2 o’clock in the afternoon? एक सटीक घड़ी सुबह में 8 बजे का समय दिखाती है। दोपहर में घड़ी जब 2 बजे का समय दिखाती है तो घंटे का कांटा कितने डिग्री घूमेगा? A) 144o B) 150o C) 168o D) 180o Correct Answer : 180o Explanation :As given the hour hand going from 8 clock in the morning to 2 clock in the afternoon is equal to 6 hours of passed time. The clock is a circle.that mean it contains 360 degrees. These 360 degrees are broken down into the 12 hours of the day. This means there are (360 / 12) = 30 degrees in an hour. Since 6 hours pass in the question, hence multiply (30 x 6) = 180 degrees How many times are the hands of a clock at right angles in a day? एक घड़ी के कांटे एक दिन में कितनी बार समकोण पर होते है? A) 22 B) 44 C) 24 D) 48 Correct Answer : 44 Explanation :In 12 hours, they are at right angles 22 times. In 24 hours, they are at right angles 44 times. What will be the angle between the hands of a clock at 3:30 O’clock? 3:30 बजे घड़ी की सुइयों के बीच का कोण क्या होगा? A) 90o B) 75o C) 135o D) 60o Correct Answer : 75o Explanation :The hour hand of a normal 12-hour analogue clock turns 360° in 12 hours (720 minutes) or 0.5° per minute. The minute hand rotates through 360° in 60 minutes or 6° per minute. The angle traced of the hour hand = 0.5 * (60*H + M)° Angle traced by the hour hand in 3 hour = 0.5 * (60*3 + 30)= 105° The angle of the minute hand = 6°*M Angle traced by the minute hand in 30 mins = 6°* 30 = 180° The angle between the hands= |Angle of hour hand - Angle of minute hand| Required angle, |105 - 180|° = 75°.