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Understanding Elementary Shapes | Exercise 5.2

Question 2

Q1) What fraction of a clockwise revolution does the hour hand of a clock turn through,

when it goes from

(a) 3 to 9 (b) 4 to 7 (c) 7 to 10

(d) 12 to 9 (e) 1 to 10 (f) 6 to 3

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  • Solution

  • Transcript

SOLUTION:

(a) the situation from 3 to 9 on clock the hour hand turns through\frac{1}{2}of revolution, clockwise.

(b) the situation 4 to 7 on the clock, the hour hand turns through \frac{1}{4\ }of a revolution, clockwise.

(c)the situation from 7 to 10 on the clock, the hour hand turns \frac{1}{4}of a revolution, clockwise.

(d) the situation from 12 to 9 on the clock, the hour hand turns \frac{3}{4}of a revolution, clockwise.

(e) the situation from 1 to 10 on the clock, the hour hand turns \frac{3}{4}of a revolution, clockwise.

(f) the situation from 6 to 3 on clock, the hour hand turns \frac{1}{4}of a revolution, clockwise.

"Hello Guys, Today. We're in question. Number one, which is what fraction of a clockwise rotation Revolution is the are and the clock go through when it goes from 3 to negative first beer over here. This is S 3 is over here. One second leg. Yes, three over here and 9 is over here. So the I had go through here all the way from 3 all the way up to 9 therefore the our at goes half Revolution clockwise with the circle half Revolution. Let's move on to the second one. The second one is from 4 to 7. So from 4 to 7 is 4 is over here after three this for the from 4 5 then 6 to 7, right it goes from here to here. And then as you lower the total there are 12 hours. Okay, so people there are 12 hour and 47 is let's say three are sit well with the is for therefore. It is total with 1/4 for evolution clockwise it Little Wonder the colonel Internal it's from 7 to 10 to 7 is over here. Seven To pain again. This is going one photo per Revolution clockwise because it is moving the air. So you have to keep ours in mind. How many hours is the r-mo? Okay, let's move further now. So the fourth of four Sonya put on is from 12 to 9 again. It is three years, but this time it is going here the way outside here. It's 12 and here it's nice. Therefore it going 1/4 of a revolution anticlockwise and take clockwise or anti-clockwise forever for it. Next one is from 1 to 10. So this is a long route. So one is over here. Okay, and it is going all the way up to 10. So 10 inches before level 2 it is going 9 and so this will be 3/4 of the Revolution and which direction the for the peripheral vision to the clockwise. Okay. Let's move on to the last one from six to three again 6 to 3 is 3 are the 3 R's backwards that is six is over here and three voice which is going Prius anticlockwise. Guys, therefore it is anti-clockwise. Okay. Thank you guys. Please like the video and subscribe our Channel. Thank you so much. "

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Question 2

Q1) What fraction of a clockwise revolution does the hour hand of a clock turn through,

when it goes from

(a) 3 to 9 (b) 4 to 7 (c) 7 to 10

(d) 12 to 9 (e) 1 to 10 (f) 6 to 3

  • Solution

  • Transcript

SOLUTION:

(a) the situation from 3 to 9 on clock the hour hand turns through\frac{1}{2}of revolution, clockwise.

(b) the situation 4 to 7 on the clock, the hour hand turns through \frac{1}{4\ }of a revolution, clockwise.

(c)the situation from 7 to 10 on the clock, the hour hand turns \frac{1}{4}of a revolution, clockwise.

(d) the situation from 12 to 9 on the clock, the hour hand turns \frac{3}{4}of a revolution, clockwise.

(e) the situation from 1 to 10 on the clock, the hour hand turns \frac{3}{4}of a revolution, clockwise.

(f) the situation from 6 to 3 on clock, the hour hand turns \frac{1}{4}of a revolution, clockwise.

"Hello Guys, Today. We're in question. Number one, which is what fraction of a clockwise rotation Revolution is the are and the clock go through when it goes from 3 to negative first beer over here. This is S 3 is over here. One second leg. Yes, three over here and 9 is over here. So the I had go through here all the way from 3 all the way up to 9 therefore the our at goes half Revolution clockwise with the circle half Revolution. Let's move on to the second one. The second one is from 4 to 7. So from 4 to 7 is 4 is over here after three this for the from 4 5 then 6 to 7, right it goes from here to here. And then as you lower the total there are 12 hours. Okay, so people there are 12 hour and 47 is let's say three are sit well with the is for therefore. It is total with 1/4 for evolution clockwise it Little Wonder the colonel Internal it's from 7 to 10 to 7 is over here. Seven To pain again. This is going one photo per Revolution clockwise because it is moving the air. So you have to keep ours in mind. How many hours is the r-mo? Okay, let's move further now. So the fourth of four Sonya put on is from 12 to 9 again. It is three years, but this time it is going here the way outside here. It's 12 and here it's nice. Therefore it going 1/4 of a revolution anticlockwise and take clockwise or anti-clockwise forever for it. Next one is from 1 to 10. So this is a long route. So one is over here. Okay, and it is going all the way up to 10. So 10 inches before level 2 it is going 9 and so this will be 3/4 of the Revolution and which direction the for the peripheral vision to the clockwise. Okay. Let's move on to the last one from six to three again 6 to 3 is 3 are the 3 R's backwards that is six is over here and three voice which is going Prius anticlockwise. Guys, therefore it is anti-clockwise. Okay. Thank you guys. Please like the video and subscribe our Channel. Thank you so much. "

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