WRITE VARIABLE EXPRESSIONS WORD PROBLEMS

Here, we are going to see some word problems on writing variable expressions. 

Write Variable Expressions Word Problems

Problem 1 :

Anaba has 10 more marbles than Susan. Write the variable expression to show the number of  marbles that Anaba has.

Solution :

Let 'x' be the number of marbles Susan has.

Then, number of marbles Anaba has

x + 10

Problem 2 :

The length of a rectangular hall is 4 meters less than 3 times the width of the hall. What is the length, if the breadth is b meters ?

Solution :

Let 'x' be the width of the hall.

Then, the length of the hall is 

=  4 meters less than 3 times the width of the hall

=  3x - 4

Problem 3 :

A rectangular box has height h cm. Its length is 5 times the height and width is 10 cm less than the length. Express the length and the width of the box in terms of the height.

Solution :

Let 'h' be the height of the rectangular box. 

Then, 

length  =  5h

width  =  5h - 10

Problem 4 :

The speed of a bus is 10 km/hour more than truck going on the same road. Express the speed of the bus in terns of the speed of the truck. 

Solution :

Let the speed of the truck be 'x' km/hour. 

Then, the speed of the bus is

=  x + 10

Problem 5 :

Price of oil per liter is 5 times the price of rice per kg. Express the price of oil in terms of the price of rice. 

Solution :

Let 'x' be the price of rice per kg

Then, the price of oil is 

=  5x

Problem 6 :

Price of wheat per kg is $5 less than the price of rice per kg. Express the price of wheat in terms of the price of rice. 

Solution :

Let 'x' be the price of rice per kg.

Then, the price of wheat is 

=  x - 5

Problem 7 :

How old will Susan be 5 years from now ? 

Solution :

Let 'x' be the present age of Susan in years.

Then, the age of Susan 5 years from now will be

x + 5

Problem 8 :

How old was Susan 4 years ago ?

Solution :

Let 'x' be the present age of Susan in years.

Then, the age of Susan 4 years ago was

x - 4

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