Question

21. The hour and minute hands of a clock are 4.2 cm and 7 cm long respectively. Find the sum
of the distances covered by their tips in 1 day.
Pls explain with steps ​

Answer 1

Answer:

1108.8cm  [ HOPE IT HELPS!]

Step-by-step explanation:

In one day hour hand revolves 2 times,

⇒ Distance covered =2(2πr)    [radius, r=4,2cm]

                                 = 4×$\frac{22}{7\\}$×4.2 = 52.8 cm

In one day minute hand revolves 24 times,

⇒ Distance covered= 24(2πR)   [radius, R=7cm]

                                 = 48×$\frac{22}{7\\}$×7 = 1056cm

Sum= [52.8+1056]cm = 1108.8cm