A boat covers 35 km downstream in 2 hours and covers the same distance upstream in 7 hours. Find the speed (in km/h) of the boat in still water.

On a $2200 \text{ m}$ long circular track, Sarita and Kavita start from the same point but in opposi...

P and Q compete in a 400 m race. P runs at a speed of $12 \text{ km/hr}$. P gives Q a head start of ...

P and Q take part in a 400 m race. P runs at 12 km/hr. P gives Q a start of 20 m and still beats him...

Reshma covers $45 \text{ km}$ at a speed of $15 \text{ km/h}$ by bicycle, $80 \text{ km}$ at a speed...

Find the **simple interest** (in ₹) on ₹2000 at an interest rate of 6.5\% per annum for the period f...

The population of a place increased to 50,000 from 2016 to 2018 at a rate of 6\% per annum, and this...