Ncert solutions

# Question 2

Q1) 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

SOLUTION:

(a) the situation from 3 to 9 on clock the hour hand turns through\frac{1}{2}of revolution, clockwise.

(b) the situation 4 to 7 on the clock, the hour hand turns through \frac{1}{4\ }of a revolution, clockwise.

(c)the situation from 7 to 10 on the clock, the hour hand turns \frac{1}{4}of a revolution, clockwise.

(d) the situation from 12 to 9 on the clock, the hour hand turns \frac{3}{4}of a revolution, clockwise.

(e) the situation from 1 to 10 on the clock, the hour hand turns \frac{3}{4}of a revolution, clockwise.

(f) the situation from 6 to 3 on clock, the hour hand turns \frac{1}{4}of a revolution, clockwise.

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