Question

A photographer offered to supply 12 copies
and 20 copies for Rs.60 and Rs.80 respectively,
and then his profits will be Rs.5 and Rs.7
respectively. What amount will he get to
supply 30 copies in order to make a profit of
Rs.10?
O
O
O
0
Rs.170.00
Rs. 105.50
Rs.140.00
Rs.125.50​

Answer 1

Answer:

rupees 105

Step-by-step explanation:

$105 rupees for 30 notebooks

Answer 2

Given:

12 copies for Rs 60 and the profit is Rs 5.

20 copies for Rs 80 and the profit is Rs 7.

To Find:

Find the amount he needs to charge for 30 copies if he wants a Rs 10 profit.

Solution

Find the cost price for 12 copies for Rs 60:

Profit = Rs 5

Cost Price = 60 - 5

Cost Price = Rs 55

Find the cost price for 20 copies for Rs 80

Profit = Rs 7

Cost Price = 80 - 7

Cost Price = Rs 73

Find the variable cost price for 1 piece:

Cost Price for 12 pieces = Rs 55

Cost Price for 20 pieces = Rs 73

(20 - 12) pieces = 73 - 55

8 pieces = Rs 18

1 piece = Rs 2.25

Find the fixed cost:

Total cost for 12 piece = Rs 55

Variable cost for 12 pieces = 12 x 2.25

Variable cost for 12 pieces = Rs 27

Fixed cost = 55 - 27

Fixed cost = Rs 28

Find the cost of 30 copies:

30 copies = 28 + 30(2.25)

30 copies = Rs 95.50

Find the selling Price:

Profit = Rs 10

Selling Price = 95.50 + 10

Selling Price = Rs 105.50

Answer: (B) Rs 105.50