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(B) First four multiples of 15 are : 15 , 30 , 45 , 60 , 75
(C)
(i) On moving from 4 to 7 :
24 hours make 360°
1 hour make 360/24 °
= 15 °
From 4 to 7 , there are 3 hours = 3*15 = 45 °
Hence , the rotated angle is 45°
(ii) From 3 to 9 = 6 hours
angle rotated = 6 * 15 = 90 °
Hence, the angle rotated is 90°
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