"Ravi  can walk a certain distance in 40 days when he rests 9 hours a day. How long  will h
Channel: Doubtnut
Date: 2020-04-12

"Ravi
  can walk a certain distance in 40 days when he rests 9 hours a day. How long
  will he take to walk twice the distance, twice as fast the rest twice as long
  each day?
`40\ d a y s`
b. `50\ d a y s`
c. `80\ d a y s`
d. `100\ d a y s`"