Question

A 3-star hotel in Delhi charges 10% sales tax on the price of the food taken. Mr. Suri and his family had food for Rs. 685. Find the total money he had to pay.

Answer 1

Hint: We will calculate the sales tax in rupees for the price that was spent on food. The sales tax will be calculated using the formula $\dfrac{10}{100}\times x$, where $x$ is the price of the food taken. Then we will add this value to the price of food. This will give us the total amount of money that had to be paid.

Complete step by step answer:
The sales tax charged by the hotel on the price of the food taken is 10%. The price for food taken by Mr. Suri and his family is Rs. 685. Now we will calculate the sales tax charged by the hotel for the food purchased by Mr. Suri and his family. To calculate that, we will use the following formula,
$S=\dfrac{10}{100}\times x$, where $x$ is the price of the food taken and $S$ is the sales tax charged on $x$.
Substituting $x=685$ in the above equation, we get the following
$S=\dfrac{10}{100}\times 685$.
Simplifying the above equation, we get
\[\begin{align}
  & S=\dfrac{685}{10} \\
 & =68.5
\end{align}\]
Now, to calculate the total amount that had to be paid, we add the sales tax to the price of the food taken. Let the total amount to be paid be $p$ Rs. Therefore,
\[p=x+S\]
Substituting the values of $S$ and $x$, we get
\[\begin{align}
  & p=685+68.5 \\
 & =753.5
\end{align}\]

Therefore, the total amount paid is 753.5 Rs.

Note: In this question, calculating the sales tax correctly is crucial. We have to take the percentage of the price as the sales tax. So it is helpful to write a formula for any price and then substituting the value mentioned in the question.