1) the minute hand of a clock is 9cm and that of hour hand is 7 cm. If they run for 3 days, how much distance is covered by both the hands?
Answers
I am not totally sure about it...
But I hope it helps you...
Answer:
Total distance covered by both hands in 3 days is 4333.44 cm
Step-by-step explanation:
Given:
Length of the minute hand of a clock = 9 cm
Length of the hour hand of clock = 7 cm
To find: Total distance covered by both hands in 3 days.
We know that,
In a day hour hand take 2 round.
⇒ In 3 Days, it take 6 rounds.
In a day minute hand take 24 round.
⇒ In 3 Days, it take 72 rounds.
Distance covered by hour hand in a round = circumference of the circle
= 2 × π × 7
= 2 × 22/7 × 7
= 2 × 22
= 44 cm
Distance covered by minute hand in a round = circumference of the circle
= 2 × π × 9
= 2 × 3.14 × 9
= 56.52 cm
Distance covered by hour hand in 3 days = 6 × 44 = 264 cm
Distance covered by minute hand in 3 days = 72 × 56.52 = 4069.44 cm
Total distance = 264 + 4069.44 = 4333.44 cm
Therefore, Total distance covered by both hands in 3 days is 4333.44 cm