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The minute hand of a big wallclock is 35cm long. Taking π = 22/7, length of the arc, its extremity moves in 18 seconds is :
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- 11 cm
- 1.1 cm
- 6.6 cm
- 6 cm
- 11 cm
Correct Option: B
As per the given in question ,
Traced arc length by minute hand in 60 × 60 seconds = 2πr
radius = 35 cm
| ∴ Length of arc made in 18 seconds = | × 18 | |
| 60 × 60 |
| Length of arc made in 18 seconds = 2 × | × | = 1.1 cm. | ||
| 7 | 60 × 60 |
