9 years ago andromedhas age was twice achillees age. 9 years hence,andromedha age will be 4/3 times the age of achilles.find hte andromedha present age in binary numbers?

a. 11011
b. 11000
c. 1001
d. 1010

• Let andromedhas and achillees present age be x and y respectively.
  now according to 1st condition
  (x-9)=2*(y-9)
  i.e.,x-2y=-9.....eq(1)
  second condition
  (x+9)=4/3(y+9)
  i.e.,3x-4y=9.....eq(2)
  solving eq 1 and 2 we get
  x=27
  On converting it into binary we get 11011==ans(a)
• 10 years agoHelpfull: Yes(27) No(0)
• am-9 = 2(ac-9) [eq.1] am+9=4/3(ac+9) [eq2].
  solving both equations . am= 27 i.e andromedha age is 27
• 10 years agoHelpfull: Yes(6) No(0)
• Let am... age =x,ach... age =y ,
  9 years ago x=2y-------(1)
  Present age=x+9 ,y+9
  Hence 9 years thier ages x+18,y+18
  x+18=(4/3)(y+18)
  substituting (1)===> we get y=9
  So,x's preent age=27binary value =11011
• 10 years agoHelpfull: Yes(3) No(0)
• ans is= 11011
• 10 years agoHelpfull: Yes(0) No(1)
• Let the present age of andromedha and achillees be a and b respectively.
  
  According to first condition,
  
  (a - 9) = 2(b-9)
  
  => a - 9 = 2b - 18
  
  => a - 2b = - 9
  
  => 2a - 4b = - 18 ---------(1)
  
  According to second condition,
  
  ( a + 9) = 4 /3 ( b + 9)
  
  => 3a + 27 = 4b + 36
  
  => 3a - 4b = 9 -------(2)
  
  On subtracting equation 1 from 2, we get
  
  a = 9 + 18
  
  a = 27
  
  Now,
  
  a - 2b = - 9
  
  => 27 - 2b = - 9
  
  => 2b = 36
  
  => b = 18
  
  Andromedha's present age = 27 years
  
  Achillees's present age = 18 years
  
  27 in binary is 11011
  
  Ans is option a
• 4 years agoHelpfull: Yes(0) No(0)