Example GIF

The height of red bar - Math Riddle

116.Math Riddles
Can you determine the height of red bar with the help of information provided in the picture below?
  • A.8
  • B.6
  • C.10
  • D.15
    • Explanation :  
      From green bar, we can deduce that
      the height of vertical bar = 2/3 of uninterrupted shadow length of the bar.
      Therefore shadow of 6m of red bar indicates the height of 4m.
      The remaining red bar casts a direct 1:1 vertical projection on the wall.
      Therefore total length = 4m + 4m = 8m.