If there r 36 hrs in a day. n 18 hrs displayed on a clock. n 90 min in 1 hr n 60 sec in 1 min. If time is 15:50 AM. what is the angle b/w the two needle.

• hours hand will sweep 360/18=20 degree each hours
  minute hand will sweep 360/90=40 degree each minute
  for 15 hours angle sweep for hour hand will be 15*20=300 degree
  now 1 hour = 90 minute => 50 minute=50/90 hours
  thus hour hand will move (5/9)*20=11.11 degree
  so total angle sweep by hour hand will be 300+11.11=311.11
  now minute hand will sweep 50*40=200 degree
  so the angle between the two hand will be 311.11-200=111.11 degree
  or 360-111.11=248.89 degree
• 9 years agoHelpfull: Yes(17) No(2)
• the clock is circular and hence a complete rotation of hand (hour, minute or second) will sweep a 360 degrees for full rotation. Since there are 18 hrs that can be displayed each hour will have a sweep angle of 360/18 = 20 degrees. Similarly minutes will have 360/90 = 4 degrees.
  Now, we have, 15*20 = 300 degrees for hour hand
  and 50*4 = 200 degrees for minute hand
  Therefore angle between two needle is: 300-200 = 100 degrees.
  However, considering a practical analog clock the answer would be less than 100 degrees as hour hand traverses little with the minute hand.
• 9 years agoHelpfull: Yes(11) No(7)
• In 15 hour 50 mint hour hand will complete 15*20+(20*50)/90=311 degree (apex)
  Mint hand 50*4=200
  Difference =111 degree
• 9 years agoHelpfull: Yes(7) No(1)
• For hour hand:
  It covers 360deg. In 18 hrs . Hence hrs hand covers 20deg per hour or hand hour covers 2/9deg per minutes (1hr=90 minute)
  For minute hand :
  it covers 360deg in 90 minutes. Hence it covers 4deg per min.
  so,
  In 50 minutes, minute hand covers 50*4=200deg
  In 15 hrs, hour hand covers 15*20=300deg and in 50 min, it also covers 50*2/9=100/9 deg
  so, angle between minutes hand and hours hand=
  300+100/9 - 200 =111.11(appox.).
  This is correct way
  
• 9 years agoHelpfull: Yes(7) No(0)
• 15:50 am = 15 hours out of 18 and 50 minutes out of 90
  hour angle = (15/18)*360 degrees = 300 degrees
  minute angle = (50/90)*360 degrees = 200 degrees
  angle b/w minute hand and hour hand = 300 - 200 degrees = 100 degrees
• 9 years agoHelpfull: Yes(2) No(3)
• Pankaj there must be a displacement in hour hand for 50 mint of time
• 9 years agoHelpfull: Yes(1) No(2)
• 111.11 degree
• 9 years agoHelpfull: Yes(1) No(0)
• 117 degrees...because it would be same as 24 hr and 12hr..because the ratio remained unchanged..
• 9 years agoHelpfull: Yes(0) No(2)
• 100 degrees..
• 9 years agoHelpfull: Yes(0) No(2)
• ak can u please explain how???
• 9 years agoHelpfull: Yes(0) No(1)
• In 15 hour 50 mint hour hand will complete->(15+(20*50))/90=311 degree (apex)
  Mint hand 50*4=200
  Difference =111 degree
• 9 years agoHelpfull: Yes(0) No(0)
• answer would be 1000/9
  
• 8 years agoHelpfull: Yes(0) No(0)
• use shortcut
  if its as usual clock use the formula 30(h+m/60)-6m
  for this qoestion
  use 20(h+m/90)-4m
  u could get 111.1 deg
• 8 years agoHelpfull: Yes(0) No(0)