Question

A minute hand of a table clock is 5cm  long. How far does its tip move in 20  minutes?
A.
44/7cm

B.   

220/21

C.   

44cm

D.   

21cm
PLEASE ANSWER FAST
Will be marked as brainliest who gives correct answer
with full explanation

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Answer 1

MATHS

The minute hand of a clock is 5cm long.How far does the tip of the hand move in 15 minutes?

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ANSWER

The minute hand moves through 2π×

60

15

=

2

π

radians.

Since the length of the minute hand is 5cm, the distance moved by the tip of the hand is given by the formula,l=rθ=5×

2

π

=

2

5π

cm

Answer 2

option C is the correct answer

Step-by-step explanation:

Length of minute hand r=4 cm

In 30 minutes, the tip of minute hand reaches diametrically opposite end of the clock.

Thus displacement of tip of minute hand d=2r=8 cm

Time taken t=30 min=30×60=1800 s

So, average velocity v

avg

=

t

d

=

1800

8 cm

=44.cm is the correct answer