Subject Experts Solutions for Chapter: Basic Operations on Arithmetic, Exercise 1: Target Exercise

Dinesh can row at $18 \mathrm{km}/\mathrm{h}$ in still water. If speed of stream is $6 \mathrm{km}/\mathrm{h}$, then how long will Dinesh take to row upto a distance of $6 \mathrm{km}$ and return to the starting point?

Hasan rows $36 \mathrm{km}$ with the stream in $6 \mathrm{h}$ and $40 \mathrm{km}$ against the stream in $8 \mathrm{h}$. Speed of boat in still water is

In a river $C$ is the mid-point between $A$ and $B$. Hari can row from $A$ to $C$ and return in $8 \mathrm{h}$ and from $A$ to $B$ in $4 \mathrm{h}$. How long would he take to row from $B$ to $A$?

A train leaves Delhi at $6:00 \mathrm{am}$ and reaches Haridwar $10:00 \mathrm{am}$. Another train leaves Haridwar at $8:00 \mathrm{am}$ and reaches Delhi at $11:30 \mathrm{am}$. At what time the trains meet?

$X,Y$ and $Z$ move along a circular path of length $1.2 \mathrm{km}$ with speeds of $6 \mathrm{km}/\mathrm{h}, 8 \mathrm{km}/\mathrm{h} \text{and} 9 \mathrm{km}/\mathrm{h}$, respectively. $X$ and $Y$ move in the same direction but $Z$ move in opposite directions. If they all start at the same time and from same place, how many times will $X$ and $Z$ meet any where on the path by the time $X$ and $Z$ meet any where on the path by the time $X$ and $Y$ for the first time anywhere on the path?

In a survey, $34\%$ of population was found to know Hindi, $46\%$ to know English and $23\%$ to know both languages. The percentage of those knowing neither English nor Hindi is

If $40\%$ of a number exceeds the $25\%$ of it by $54$. The number is

What percent of an hour is $2 \min$?