Question

Raju purchases 10 pens for Rs.150 and Manish buys 7 pens for Rs.84. Can you say who got the pens cheaper?

Answer 1

Hint: Here we go through with the help of the unitary method to solve the question. First we find out the price of each pen bought by Raju and Manish respectively with the help of a unitary method. Then we will compare those two prices to find which one is the cheaper.

Complete step-by-step answer:
Here In the question it is given that Raju purchases 10 pens for Rs.150
Now by applying unitary method, the price of one pen is $\dfrac{{150}}{{10}} = Rs.15$
And in the question it is also given that Manish buys 7 pens for Rs.84.
Now by applying unitary method, the price of one pen is $\dfrac{{84}}{7} = Rs.12$
Here we clearly see the result that Manish got the pens Rs.3 cheaper than the Raju.
Hence we can say that Manish gets the pen cheaper.

Note: Whenever we face such a type of question the key concept for solving the question is whenever we have to compare the price we have to first calculate the price of a single piece by the help of a unitary method and then compare their prices which is cheaper.