Subject Experts Solutions for Chapter: Work, Time, Distance and Speed, Exercise 1: Practice Exercise

A streamer goes downstream from one port to another in $4 \mathrm{h}$ . It covers the same distance upstream in $5 \mathrm{h}.$ If the speed of stream is $2 \mathrm{km}/\mathrm{h}$, the distance between the two ports is

$120$ men had food provision for $200$ days. After$5$days,$30$men died of an epidemic. The food will last for further

Pipe A can fill a tank in $10 \mathrm{h}$ and pipe B can fill the same tank in $12 \mathrm{h}$. Both the pipes are opened to fill the tank and after $3 \mathrm{h}$ pipe A is closed. Pipe B will fill the remaining part of the tank in

In a school for mid-day meal food is sufficient for $250$ students for$33$ days, if · each student is given $125 \mathrm{g}$meal. $80$ more students joined the school. If same amount of meal is given to each student, then the food will last for

A train 'X leaves station 'A' at $3$ p.m and rea~hes station 'B' at $4.30$p.m., while another train 'Y' leaves station 'B' at $3.00$p.m and reaches station 'A' at $4.00$p.m. These two trains cross each other at

Taps 'A' and 'B' can fill a tank is $37\frac{1}{2}$ minutes and $45$ minutes respectively. Both taps are opened and after some time tap 'B' is turned off. The tank is filled completely in exactly $30$minutes, if tap 'B' is turned off after

Two men and seven boys can do a work in $14$ days. There men and eight boys can do the same work in $11$days. Further eight men and six boys can do three times the amount of this work in

A boat travels upstream from A to B and back from B to A in $5$h. The speed of the boat in still water is 8 km/h and the speed of the current is $4$km/h. Then, the distance from A to B is