Problems on Average Speed

A motorist travels to a place $150 \mathrm{km}$ away at an average speed of $50 \mathrm{kmph}$ and returns at $30 \mathrm{kmph}$. His average speed for the whole journey in $\mathrm{kmph}$ is _____

Distance between two stations $\mathrm{x}$ and $\mathrm{y}$ is $778 \mathrm{km}$. A train covers the journey from $\mathrm{x}$ to $\mathrm{y}$ at a speed of $84 \mathrm{kmph}$ and returns to $\mathrm{x}$ with a speed of $56 \mathrm{kmph}$. Find the average speed of the train (in $\mathrm{kmph}$) for the whole journey.

A Particle Moves with a Speed of $2 \mathrm{m}/\mathrm{s}$ for $20 \mathrm{s}$. It Again Moves with a Speed of $4 \mathrm{m}/\mathrm{s}$ for another $20 \mathrm{s}$ and Finally Moves with a Speed of $6 \mathrm{m}/\mathrm{s}$ for Next $20 \mathrm{s}$. Calculate the Average Speed of the Particle? $(\text{in} \mathrm{m}/\mathrm{s})$

A Particle Moves with a Speed of $4 \mathrm{m}/\mathrm{s}$ for $20 \mathrm{s}$. It Again Moves with a Speed of $6 \mathrm{m}/\mathrm{s}$ for another $20 \mathrm{s}$ and Finally Moves with a Speed of $8 \mathrm{m}/\mathrm{s}$ for Next $20 \mathrm{s}$. Calculate the Average Speed of the Particle? $(\text{in} \mathrm{m}/\mathrm{s})$

A man travelled a distance of $80 \mathrm{km}$ in $7$hours partly on foot at the rate of $8 \mathrm{km}/\mathrm{h}$and partly on bicycle at $16 \mathrm{km}/\mathrm{h}$. Find the distance travelled on foot.

A Kinetic Honda covers a distance of 140 km in 2 hours and 20 minutes while a car covers the same distance in 1 hour and 40 minutes. What is the ratio of their speeds?

Three friends Anshu, Shweta and Aditi start to run around a circular stadium. They complete a revolution in 24, 36 and 30 seconds respectively. After how many minutes will they meet at the starting point?

The speed of a bus is 55 km./hr. The average speed of a car is 26% more than the average speed of bus. What is the distance covered by car in 8 hours?

A Shatabdi express train, owing to a defect in the engine, goes at of its proper speed and arrives at $$\frac { 5 }{ 8 }$$ 6:49 pm. instead of 5:55 pm. At what hour did it start?