GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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60*
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75*
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180*
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360*
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Detailed explanation-1: -A minute hand of a clock makes a complete revolution in one hour. That is, it turns 360∘ in one hour.
Detailed explanation-2: -The hour hand of a clock moves one full circle in 12 hours. Hence it completes 360∘ in 12 hours.
Detailed explanation-3: -One hour and 45 minutes is equal to 105 minutes, and in 105 minutes, the hour hand rotates a total of 105(1/2) = 52.5 degrees. It takes the minute hand 60 minutes to rotate complete around the clock a total of 360 degrees. That means the minute hand rotates at a rate of 360/60 = 6 degrees per minute.
Detailed explanation-4: -When the minute hand will move through 1 minute, it will move through 6 degrees. See full answer below.
Detailed explanation-5: -Hence in 30 minutes the hour-hand of a clock the angle will be form is 15 .