25
The hour-hand of a clock is $6$ cm long. The angle swept by it between $7:20$ a.m. and $7:55$ a.m. is:
- (a)$(\frac{35}{4})^\circ$
- (b)$(\frac{35}{2})^\circ$
- (c)$35^\circ$
- (d)$70^\circ$
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(b) $(\frac{35}{2})^\circ$