Question

What fraction of a clockwise revolution does the hour hand of a clock turn through.
when it goes from
(a) 3 to 9 (b) 4 to 7 (c) 7 to 10
(d) 12 to 9 (e) 1 to 10 (1) 6 to 3
Where will the bar
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Answer 1

Answer:

A:9/3=1/3

B:7/4=7/4

C:10/7=10/7

D:12/9=4/3

E:1/10=1/10

F:6/3=2/1

Explanation:

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Answer 2

Answer:

What fraction of a clockwise revolution does the hour hand of a clock turn through, when it goes from

(a) 3 to 9   (b) 4 to 7   (c) 7 to 10   (d) 12 to 9   (e) 1 to 10   (f) 6 to 3

Answer:

We may observe that in 1 complete clockwise rotation, the hour hand will rotate by 3600

(a) When the hour hand goes from 3 to 9 clockwise, it will rotate by 2 right angles or 1800

So, Fraction = 180/360 = 1/2

(b) When the hour hand goes from 4 to 7 clockwise, it will rotate by 1 right angle or 900

So, Fraction = 90/360 = 1/4

(c) When the hour hand goes from 7 to 10 clockwise, it will rotate by 1 right angle or 900

So, Fraction = 90/360 = 1/4

(d) When the hour hand goes from 12 to 9 clockwise, it will rotate by 3 right angles or 2700

So, Fraction = 270/360 = 3/4

(e) When the hour hand goes from 1 to 10 clockwise, it will rotate 3 right angles or 2700

So, Fraction = 270/360 = 3/4

(f) When the hour hand goes from 6 to 3 clockwise, it will rotate 3 right angles or 2700

So, Fraction = 270/360 = 3/4

Explanation: