Quantitative Aptitude 13

Replies

• 

  Saandeep Sreerambatla

  Its 2 Steps above.
  
  @Mona: Good going to keep this initiative active. Could you increase the difficulty level .
• 

  rishi0922

  its soooo easy mona, so increase the toughness ......./
• 

  Chitti

  Increased difficulty level....
  
  A and B are participating i a 1500 m race. A gives B a lead of 50 m and beats him by 10 m in a 500 m race. If B completes the 1500 m race in 44 minutes, then A finishes the race.....minutes before B.
  1) 2 minutes
  2) 12 minutes
  3) 14 minutes
  4) 20 minutes
• 

  mathbyvemuri

  "A gives B a lead of 50 m and beats him by 10 m in a 500 m race"
  => this means, in the same amount of time the distances travelled by A and B are as follows:
  distance travelled by A = 500m
  distance travelled by B = 450-10 = 440m
  
  => (Speed of A)/(Speed of B) = 500/440 = 50/44
  As the speed and time are inversly proportional for the same amount od distance,
  => (Time taken by A)/(Time taken by B) = 44/50
  => (Time taken by A) = (44/50)(Time taken by B)
  
  This relation holds good for any race, if the speeds of A and B are assuned constant.
  
  "B completes the 1500 m race in 44 minutes"
  => A completes this in = (44/50)*44 = this comes approximately to be 39 minutes
  A completes the race 44-39 = 5 minutes before B
  
  Answer is not available in the options, pl check