Question

Pinky paid rs 36 for 3 copies and 2 pens . A pen cost 3 times as much as a copy . How much did she paid for a pen

Answer 1

Answer: Pinky spends 24 Rs for 2 pens

Step-by-step explanation:

Let the cost of a Pen = x Rs

The cost of a Copy = y Rs

Cost of 3 copies = 3 × cost of one copy

                           = 3 × y

                          = 3y Rs

Cost of 2 pens = 2 × cost of one pen

                        = 2 × x

                        = 2x Rs

According to question,

Pinky paid Rs 36 for 3 copies and 2 pens.

So,          2x + 3y = 36              ------------------------  1

According to question,

A pen cost 3 times as much as a copy

i.e.       x = 3y

Put  x = 3y in equation 1, we get-

                                2(3y) + 3y = 36

                                   6y + 3y = 36

                                       9y = 36

                                        y = 4 Rs

Cost of a Copy = 4 Rs

Cost of Pen = 3y

                   = 3 × 4

Cost of Pen = 12 Rs

Hence Pinky spends 24 Rs for 2 pens.

 

Answer 2

Answer:

Pinky paid rs 36 for 3 copies and 2 pens . A pen cost 3 times as much as a copy . How much did she paid for a pen