Question

The minute hand of a watch is 1.5 cm long. How far does its tip move in 40 minutes? (Use π = 3.14)

Answer 1

60 minutes = 360 degrees.

1 minutes = 6 degrees. 

40 minutes = 240 degrees

240° = 240 × \(\frac{\pi}{180} = \frac{4 \pi}{3}\)

The required distance travelled = l = rθ

1.5 x \(\frac{4 \pi}{3} = 2 x 3.14 = 6.28 cm\)