a soft. engr just returned from US has eaten too mucgh fat &put
a lot of weight everfy sunday he starts walking 4 km/hr on level
ground then up at 3 kmhr then back down hill at 6kmhr then again
on level grounggd at 4kmhr till he reaches his destination if he
returned home at 9 p.m. e what distance did he covered

• total distance will be 2(x+y)
  = 2*18 = 36 km
• 13 years agoHelpfull: Yes(3) No(1)
• time taken on ground level t1=x/4hr;
  time taken up on hill t2=y/3hr;
  time taken back down t3=y/6hr;
  time taken to reach the destination t4=x/4hr;
  total time t=9hr;
  t=t1+t2+t3+t4;
  x/4+y/3+y/6+x/4=9;
  x+y=18km.
  distance covered=18 km.
  ans-18km.
  
• 13 years agoHelpfull: Yes(2) No(1)