a turtle crossing the field.what is total distance passed by a turtle?consider two following statements X average speed of turtle 2m/min.y had turtlewalked 1 m/min faster than his average it would have been finished 40 mintue earliar.(1)A statement alone is sufficient(2)both statement x and y are needed(3)y is sufficint(4)both are not sufficint

• we need both time and speed for getting distance. we get the speed from X. bt we also need the time which we can calculate from Y. so, ans is (2)
• 12 years agoHelpfull: Yes(18) No(1)
• both statements are required because-->
  s= d/t => 2 met/min = D/T => D= 2T
  if s= 3 met/min => D/(T-40) => D=(3T-40)
  hence on solving above eqns we get distance. Hence we need both statements to solve puzzle.
  
• 12 years agoHelpfull: Yes(9) No(1)
• in 1min=2meter
  in xmin=2x m
  
  if in 1min=3min
  in x-40=?
  
  3x-120=2x (distance same)
  x=120
  distance=240m
  
  both data r used..so answer is B
• 12 years agoHelpfull: Yes(7) No(1)
• ans is both statement x and y are needed.......
• 12 years agoHelpfull: Yes(3) No(2)