Question

Ravi can walk `3 1/3` km in one hour. How long will it take him to walk to his office which is 10 km from his home?

Answer 1

Given, Ravi can walk `3 1/3` km in 1 h

∴ Ravi’s speed = `3 1/3` km/h

= `((3 xx 3) + 1)/3`  ...`[∵ "Speed" = "Distance"/"Time"]`

= `(9 + 1)/3`

= `10/3` km/h

∵ Distance between Ravi and his office = 10 km 

∴ Time = `"Distance between Ravi and his office"/"Ravi’s speed in 1 h"`

= `10/(10/3)`

= `10/1 xx 3/10`  ...[∵ Division is  reverse of the multiplication]

= `30/10`

= 3 h

Hence, Ravi reaches his office in 3 h.