Q4 A minute hand of a clock 7cm long, calculate the distance covered by it from 9:00 AM to 9:30 AM? (a) 1ocm (b) 22cm (C) 7cm (d) 14cm
Answers
Answered by
0
Answer:
You will need to find theta( the angle made by the minute hand) in this question .
Explanation:
angle made by the minute hand in 60 mins = 360 °
∴ angle made by the minute hand in 1 min = 360/60 = 6 ° = theta
∴ angle made by the minute hand in 30 mins = 6 ° × 30 = 180 °
the distance covered by the minute hand of the circle is the length of the arc made by the hand .
Radius of the clock = 7 cm
theta = 180 °
length of arc = theta / 360 × 2 π r
⇒180 / 360 × 2 × 22 / 7 × 7
⇒1 / 2 × 2 × 22 / 7 × 7
⇒22 cm
∴ Distance covered by the minute hand is 22 cm
Hope you understood the answer :>
plz mark this as brainliest!
Similar questions