Question

Avinash is 1.8m tall. Arun is 191 cm tall. How much taller is Arun then Avinash?

Answer 1

 Hint: This problem is based on linear equations. When the equation has only one variable, then this type of equation is known as a linear equation in one variable.
There are several steps to solve the word problem:
Read the problem carefully, and figure out what it is asking you to find.
Assign a variable to the quantity you are trying to find.
Write down what the variable represents.
Re-read the problem and write an equation for the quantities given in the problem.
Solve the equation.
Answer the question in the problem. Many times you will need to take the answer you get from the equation and use it in some other way to answer the question originally given in the problem.
Check your solution.
And one more thing is unit conversions which is very important to know while solving the questions.
\[\left( {1{\text{ }}m{\text{ }} = {\text{ }}100{\text{ }}cm} \right)\]
Here, we convert both the heights into the same unit and then compare them.

Complete step-by-step answer:
Given that, the height of Avinash = 1.8m
\[\left( {1{\text{ }}m{\text{ }} = {\text{ }}100{\text{ }}cm} \right)\]
∴The height of Avinash = \[1.8 \times 100{\text{ }} = {\text{ }}180{\text{ }}cm\]
The height of Arun = 191 cm
After converting heights of both into centimetre, we get to know that Arun is taller than Avinash.
Therefore, the difference between their heights = \[191{\text{ }}-{\text{ }}180{\text{ }} = {\text{ }}11{\text{ }}cm\]

Hence, Arun is 11 cm taller than Avinash.

Note: There are two methods that are used for unit conversion problems, to convert bigger units to a smaller unit multiply and to convert a smaller unit to a bigger unit divide
To solve these types of questions, reasoning must be performed based on common sense knowledge and the information provided by the source problem. Some word problems ask to find two or more quantities. We will define the quantities in terms of the same variable. Be sure to read the problem carefully to discover how all they relate to each other.