Special watch

Fero bought a special watch on the market. They have only one (minute) hand and a display that shows which angle between the hour and minute hand. How many hours it was when his watch showed - the minute hand points to number 2; the display shows 125°?


h1 = 6:10 Wrong answer
h2 = 9:50 Wrong answer


d=36012=30  A=125  B=360A=360125=235   m1=2 d=2 30=60   h1=(A+m1)/d=(125+60)/30=3766.1667=6.16667=6:10d = \dfrac{ 360 }{ 12 } = 30 \ ^\circ \ \\ A = 125 \ ^\circ \ \\ B = 360 - A = 360 - 125 = 235 \ ^\circ \ \\ \ \\ m_{ 1 } = 2 \cdot \ d = 2 \cdot \ 30 = 60 \ ^\circ \ \\ \ \\ h_{ 1 } = (A + m_{ 1 }) / d = (125 + 60) / 30 = \dfrac{ 37 }{ 6 } \doteq 6.1667 = 6.16667 = 6:10
h2=(B+m1)/d=(235+60)/30=5969.8333=9.83333=9:50 h2...nevyhovujeh_{ 2 } = (B+m_{ 1 }) / d = (235+60) / 30 = \dfrac{ 59 }{ 6 } \doteq 9.8333= 9.83333 = 9:50 \ \\ h_{ 2 } ... nevyhovuje

Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
1st comment
Be the first to comment!

Tips to related online calculators
Do you want to convert time units like minutes to seconds?
Try conversion angle units angle degrees, minutes, seconds, radians, grads.

Following knowledge from mathematics are needed to solve this word math problem:

Next similar math problems:

  1. Delayed clock
    clock-night-schr Michael put a new battery into his watch at midnight. However, they are 5 seconds late each minute. How many hours does the watch show in 24 hours?
  2. In the orchard
    stromy_7 In the orchard, they planted 25 apple trees, 20 pears, 15 plums and 40 marbles. A strong late frost, however, destroyed a fifth of all new trees. Unfortunately, it was all the trees of one kind of fruit. What is the probability that the plums have died ou
  3. Eight hours
    clocks_15 Brigadier Franta ties a sheaf of hay in 20 minutes. Lujza in the same time only a quarter. How many sheaves will they tie together in 8 hours?
  4. Mr and Mrs
    clocks2_8 Mr. Calda and Mrs. Cald have a total of 139 years. How many years have when we know that Mr. Calda is 9 years older than Mrs. Cald
  5. Suzan
    eliska My daughter reaches X years in X squared, said Suzan father in 2009 during the celebration of her birthday. When will given fact become reality and how many years at that time will have Suzan?
  6. Tunnels
    Mysky Mice had built an underground house consisting of chambers and tunnels: • each tunnel leading from the chamber to the chamber (none is blind) • from each chamber lead just three tunnels into three distinct chambers, • from each chamber mice can get to an
  7. Helmet
    Clock0400_7 Nowadays cycling better results could be obtained not only due to rider physical preparation but also thanks to using updated technologies. One of the essential parts of the rider´s equipment is his or her helmet. While most bikers wear a helmet mainly t
  8. Time passing
    clock-night-schr 6 years ago, Marcela's mother was two times older than her and two times younger than her father. When Marcela is 36, she will be twice as young as her father. How old are Marcela, her father, and mother now?
  9. Workers
    okno2_1 Group of workers washing half of the windows of the building in two hours. How long will take half the workers wash all the windows of the building?
  10. Skiing meeting
    compass4 On the skiing meeting came four friends from 4 world directions and led the next interview. Charles: "I did not come from the north or from the south." Mojmir "But I came from the south." Joseph: "I came from the north." Zdeno: "I come from the south." W
  11. 5 pumps
    pump Five pump to pump 3 hours 1600 hl of water. How long pumped same amount of water 4 pumps?
  12. Family
    family_14 Mom is 42 years old and her daughters 13 and 19. After how many years will mother as old as her daughter together?
  13. Slope
    slope_1 Find the slope of the line: x=t and y=1+t.
  14. Three friends
    oriental The three friends spent 600 KC in a teahouse. Thomas paid twice as much as Paul. Paul a half less than Zdeněk. How many each paid?
  15. Circular lawn
    circular_flowerbed_1 Around a circular lawn area is 2 m wide sidewalk. The outer edge of the sidewalk is curb whose width is 2 m. Curbstone and the inner side of the sidewalk together form a concentric circles. Calculate the area of the circular lawn and the result round to 1
  16. Degrees to radians
    angle Convert magnitude of the angle α = 9°39'15" to radians:
  17. Propeller
    Tupolev_Tu-95 The aircraft propeller rotates at an angular speed of 200 rad/s. A) What is the speed at the tip of the propeller if its distance from the axis of rotation is 1.5 m? B) What path does the aircraft travel during one revolution of the propeller at a spee