A boat is moving in a river, downstream, whose stream has speed 8 km per hour. The speed of the motor of the boat is 22 km per hour. Draw the graph of the distance covered by the boat versus an hour.

Given, Speed of boat = 22 km/h

Speed of stream = 8 km/h

Movement of boat downstream means that the boat is moving with the flow of the river and thus the total speed of boat will be the sum of the speed of boat and speed of the river. Thus,

Net speed = 22 + 8

= 30 km/h

⇒ Distance = Speed × time

Let distance be ‘d’ and time be ‘t’

⇒ d = (30)t

For different values of t and d

Plotting above values in the graph, we get