Two vertical pole of 2 m and 8 m stand apart on a horizontal plane.The height in meters at the point of intersection of the line joining the top of each pole to the bottom of other pole is ....
a.1.8
b.1.6
c.5.6
d. cannot be determined without knowing the distance bw the bottom of the pole

• in this question drawing the diagram correctly and precisely will get u to the answer easily.
  
  make 2 poles AB and at some distance from the foot of AB make CD name them AB=2m. and CD =8m
  
  then, the next step will be,,
  
  joining the foot of both the towers.
  
  now join AD and BC,and name the point of intersection of these lines as E .
  
  now draw a perpendicular from E to line BD.and name that point F and say EF=x
  
  now F divides both BD in two parts let it be P and Q ,,i.e BF =p and FD = Q.
  
  now observe triangle ABD& EFD,they are similar hence x/Q=2/P+Q
  
  x= 2Q/P+Q......(1)
  
  now observe triangle CBD and EBF,they are also similar hence x/P=8/P+Q
  
  x=8P/P+Q......(2)
  
  now equate (1) and (2)
  we will get Q=4P now put Q=4p in equation (1)
  i.e x/4P=2/5p
  x= 8P/5P
  x=1.6
  
  hence drawing diagram makes ur approach quite easier!!
  
  
  
• 10 years agoHelpfull: Yes(75) No(2)
• formula is...(p*q)/p+q
  here p=2,q=8
  height in meters=(8*2)/8+2=16/10=1.6(option b is correct)
• 10 years agoHelpfull: Yes(13) No(2)
• 1.6
  am i right
  
• 10 years agoHelpfull: Yes(3) No(1)
• 1.6m
  draw diag and use property of similar triangles....
• 10 years agoHelpfull: Yes(1) No(1)
• Thanks Swapnil...
  Very nice answer....
• 10 years agoHelpfull: Yes(1) No(0)
• SWAPNIL DUBEY..thank you very much...awsome
• 10 years agoHelpfull: Yes(1) No(0)
• I dont knw the ans...thats y i am asking. but the asn is not d....cause i answered d...and it was wrong
• 10 years agoHelpfull: Yes(0) No(1)
• 4
  base is required for solve
• 10 years agoHelpfull: Yes(0) No(3)