Question

If 9 pens cost Rs. 135, then how
many pens will you get for 75
rupees?​

Answer 1

Here the cost of 9 pens is given to be Rs. 135

We will first find the cost of one pern

Cost of 9 pens = 135

cost of 1 pen = 135/9

                     = 15

Now, we have to find the number of pens that can be purchased for Rs 75

number of pens = total amount/price of 1 pen

                          = 75/15

                         = 5

Hence, 5 pens can be purchased for Rs. 75

Answer 2

Given - Cost of 9 pens = Rs. 135

Find - Number of pens that cost Rs. 75

Solution - Solving the given problem using unitary method. So, 9 pens cost rupees 135.

Hence, one pen will cost = 135/9

Cost of one pen = 15

Now, 15 rupees can get you one pen

Therefore, 75 rupees can get number of pens = 1/15*75

Number of pens in 75 rupees = 75/15

Number of pens in 75 rupees = 5

Thus, 5 pens can be bought in Rs. 75.