Jharne De and Ranjana Kumar Solutions for Chapter: Commercial Mathematics, Exercise 1: Mental Maths

If $x$ and $y$ vary directly, then find the missing numbers in the given table?

If $x$ and $y$ vary directly, then find the missing numbers in the given table?

The variable $x$ varies directly as $y$, and when $y$ is $28$ and $x$ is $\frac{4}{7}$. Find $y$ when $x$ is $14$.

Suman bought $17$ handmade sheets for $₹510$. Find the cost of $20$ such sheets. 

A car takes $18 \mathrm{hours}$ to travel $540 \mathrm{km}$. Find the time taken by it to travel $720 \mathrm{km}$, if the speed of the car is constant. 

A man covers a distance of $60 \mathrm{m}$ in $40$ steps. How many steps will he take to cover a distance of $300 \mathrm{m}$?

Five bags of wheat weigh $150 \mathrm{kg}$. Find the number of bags weighing $240 \mathrm{kg}$?

A machine caps $1,540$ bottles in $6 \mathrm{hours}$. How long will it take to cap $2,310$ bottles?