Question

1. If cost of five pencil is same as the cost of one notebook, if cost of 7 pencil and 7 notebooks together

is Rs 210 , then find the cost of 2 pencils and 3 notebooks?​

Answer 1

Answer:

Refer to the attachment

Answer 2

Answer:

Let the cost of one pencil and one notebook be x and y respectively.

A/q

5x = y ..............eq.1

Also,

7x + 7y = 210

7(x + y) = 210

x + y = 30

x + 5x = 30 (From eq.1)

6x = 30

x = 5

Put this in eq.1

y = 5x = 5 × 5 = 25

Cost of one pencil = Rs.5

Cost of one notebook = Rs.25

Now,

Cost of two pencils = 2x = 2 × 5 = Rs.10

Cost of three notebooks = 3y = 3 × 25 = Rs.75

Hope this helps.

Step-by-step explanation: