Chapter SH, Problem 2.6APP

To determine

To Calculate: The average speed of the bus.

Answer to Problem 2.6APP

The average speed of the bus is $\text{100 km/h}$ .

Explanation of Solution

Given data:

Distance travelled before stopping for lunch $=350\text{ km}$

Distance travelled after lunch(until the end of the trip) $=250\text{ km}$

The time at which the bus leaves for the trip $=9\text{ a}\text{.m}\text{.}$

The time at which the trip ends $=3\text{ p}\text{.m}\text{.}$

Formula used:

  $\text{average speed}=\frac{\text{total distance}}{\text{total time}}$

Calculation:

As per the problem,

Distance travelled before stopping for lunch $=350\text{ km}$

Distance travelled after lunch (until the end of the trip) $=250\text{ km}$

Total distance covered by the bus during the trip is

Total distance $=350\text{ km}+250\text{ km}=600\text{ km}$

The time at which the bus leaves for the trip $=9\text{ a}\text{.m}\text{.}$

The time at which the trip ends $=3\text{ p}\text{.m}\text{.}$

Therefore, total time $=6\text{ h}$

Putting the values of total distance and total time in the average speed-formula

  $\begin{array}{l}\text{average speed}=\frac{\text{total distance}}{\text{total time}}\\ \text{average speed}=\frac{600\text{ km}}{\text{6 h}}=100\text{ km/h}\end{array}$

Conclusion:

The average speed of the bus is $\text{100 km/h}$ .