V K Raman and S N Sharma Solutions for Exercise 1: EXERCISE

A bus covered a distance of $45 \mathrm{km}$ in $2$ hours. On the return journey it covered the same distance in $1$ hour $45$ minutes. Find the average speed for the entire trip.

A ship sailed $75$ knots in $4$ hours and returned in the same route in $3$ hours $30$ minutes. Find it's average sailing speed.

A train of length $132$$\mathrm{m}$ passed a signal pole in $13$ seconds. On the return journey it passed the pole in $11$ seconds. Find its speed for both ways put together.

Rajiv ran across a bridge $175 \mathrm{m}$ long in $26$ seconds. He ran back and crossed the bridge in $24$ seconds. Find his average speed.

My friend Shyamala scootered $15 \mathrm{km}$ in $50$ minutes and further rode $20 \mathrm{km}$ in $1$hour $40$ minutes. If her average speed in $x \mathrm{km}/\mathrm{h}$, then find the value of $x$.

Ghosh Bhandari swam $150 \mathrm{m}$ in $28$ seconds and further $100 \mathrm{m}$ in $22$ seconds. Find his average speed of swimming.

Sonali cycled $500 \mathrm{m}$ in $145$ seconds, $650 \mathrm{m}$ in $135$ seconds and $450$$\mathrm{m}$ in $120$ seconds. Find her average speed.

A plane flew $600 \mathrm{km}$ in $1$ hour $30$ minutes, $800 \mathrm{km}$ in $1$ hour $45$ minutes and $400 \mathrm{km}$ in $45$ minutes. If its average speed is $x \mathrm{km}/\mathrm{h}$, then find the value of $x$.