Question

A bus travels at v km per hour. It is going from Daspur to Beespur. After the bus has travelled 5 hours, Beespur is still 20 km away. What is the distance from Daspur to Beespur? Express it using v.

Answer 1

Hint:In this question, we have given the speed of a bus and the time it travelled. So, we can find the distance it travelled in 5 hours at v km per hour. And it has already been given in the question that Beespur is 20 km away. So, we can easily find the total distance (in terms of v) between Daspur and Beespur by adding both the distances.

Complete step-by-step answer:
Given,
Speed of the bus = v km per hour
A bus travelled for = 5 hours.
We know that, Distance = Speed × Time
Thus, Distance travelled by a bus in 5 hours = 5v km
Distance left to reach Beespur = 20 km
Total distance between Daspur and Beespur = Distance travelled in 5 hours with speed v km per hour + 20 km.
Total Distance from Daspur to Beespur = (5v + 20) km
Hence, Distance between Daspur and Beespur is (5v + 20) km

Note:In these types of questions, first understand what quantities are given. Above question is of time, Speed and Distance where Speed is directly proportional to distance and inversely proportional to time. So, we define Speed as distance divided by time. Speed is expressed in m/sec, km/hr. Speed tells about how fast or slow any object moves. There is another concept of Speed that is average speed. Average speed of an object is the total distance travelled by the object divided by the elapsed time to cover that distance.