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Clock Part 2
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Clock chapter 2

Piyush Dixit
A Techie who is blend of Software Engineering as profession and Teaching as Passion.

U
Unacademy user
sure mam we support you plz hor v Punjabi de lesson bna Dena .
  1. Piyush Dixit MCA 4 years of teaching experience for Competitive Exams


  2. Clock Chapter-2 6 "Don't just watch the clock do what it does, Keep Going"


  3. For some specific questions following tricks can work 1. Time is 2:20 Angle Mod value of (30H-11/2*M) - Mod value of (30*2-11/2*20) -Mod value of (60-110) 50% Trick If ratio of angle between hour and minute hand will be 1:10 then for calculating angle multiply minute with 2.5 and yoru will get answer 20* 2.5 50


  4. 2. Time is 4:24 If ratio b/w hour and minute hand is 1:6 then in order to find the angle - Minute/2 Means 24/2 12 is Answer 3. Time is 5:25 If ratio b/w hour and minute hand is 1:5 then in order to find the angle - Minute/2 Means 25/2 12.5 is Answer


  5. 4. Time is 7:28 If ratio b/w hour and minute hand is 1:4 then in order to find the angle - Minute*2 Means 28 2 56 is Answer 5. Time is 5:15 7:21 If ratio b/w hour and minute hand is 1:3 then in order to Minute/2) find the angle - {Minute* 4 Means 15*4+15/2 67.5 is Answer


  6. 12 One lmportant Concept: 2 4 55 Minutes space is gained by, Minute Hand in 60 minutes Hence 1 minute space will be gained in 60/55 Minutes or 12/11 Minutes


  7. Q. At what time between 4 to 5 o'clock, will the hands of a 12 watch be together? 0 2 A) 4:18 (6/11) B) 4:21 (9/11) C) 4:21 (6/11) D) 4:23 (9/11) Now since we need to cover 20 minutes to be together, hence 4 20*12/11- 240/11- 21 (9/11) So our desired time will be 4: 21 (9/11) minutes


  8. Q. At what time between 4 to 5 o'clock, will the hands of a watch be together? A) 4:18 (6/11)B) 4:21 (9/11) C) 4:21 (6/11) D) 4:23 (9/11) Now as we know that above given condition is of coincide (0) Hence apply formula Mod value of (30H-11/2 M) 0 (30*4-11/2M) 120 11/2 M M- 240/11 21 (9/11) Hence Option B will be our answer


  9. Q. Similarly At what time between 7 to 8 o'clock , will the hands of a watch be together?


  10. Q. At what time between 8 to 9 o'clock, will the hands of a clock face in opposite direction? 12 0 2 A) 8:10 (10/11) B) 8:10 (9/11) C) 8:11 (9/11) D) 8:09 (9/11) So as we need to travel from 12 to 2 then distance travelled 4 will be 120/11 10 (10/11) 8:10 (10/11)