In how many times a hands of a clock will make an angle of 1800 in a day ? एक पूरे दिन में घडी की सुइयो के बीच कितनी का बार 1800 कोण बनेगा ?

The hour and minute hands of a clock form a 180° angle 11 times every 12 hours (not 12 times because they overlap at 6 o'clock which is counted differently). In 24 hours (one full day), this happens 22 times. The hands are at 180° at approximately 12:32, 1:38, 2:43, 3:49, 4:54, 6:00, 7:05, 8:11, 9:16, 10:22, and 11:27 (and the mirrored times in the afternoon/evening). Option B (22) is correct.