Question

A boat running downstreams covers a distance of 30 km in 2 h. while coming back, the boat takes 6 h to cover the same distance. if the speed of the current is half that of the boat, what is the speed of that boat in km?

Answer 1

28 km/h is theanswer

Answer 2

Speed of boat downstream

= Distance coveredTime taken=302Distance coveredTime taken=302 = 15 km/h

Now, speed of boat upstream

= Distance coveredTime taken=306Distance coveredTime taken=306 = 5 km/h

Now, speed of boat

= Speed downstream+Speed upstream2Speed downstream+Speed upstream2

= 15+52=20215+52=202 = 10 km/h