Question

a large hand of clock is 42 cm long. how many cm does its extremity move in 20 min ?

Answer 1

20 minutes means 4 x 30o = 120o

so if you calculate the sector circumference , you will get the answer as

2 x Pi x R (120/360) = 2 x 22 /7  x 42 x 1/3  = 88 cm Ans.

Answer 2

Step-by-step explanation:

I hope my friend it will help you