Question

the cost of books is directly proportional to the no. of books . If the cost of 45 books is ₹200 then what will be of 70 books

ans with steps​

Answer 1

Answer:

₹311.11

Step-by-step explanation: you do 45 books is equal to ₹200

then 70 books is equal to x then you cross multiply

45 = ₹200

70 = x

x=70×₹200 then the answer divided by 45 you will get 311.1111 so you will round off the answer to 2 d.p because the answer is money so basically it will be ₹311.11

Answer 2

Answer: Rs.311.08

Step-by-step explanation:

According to the question

Cost= k×N (k=proportional constant)

200 = k×45

200/45=k

4.444=k

Therefore cost of 70 books will be

k×70

4.444×70

Rs.311.08