Question

11. Cost of 5 books and 4 note books is 100. If
the cost of one book is 12, find the cost of
one note book.
(A) ₹ 15
(B) ₹ 12
(C) ₹10
(D) 10-50
12. A man can copy 75 pages in 45 hours. For
every hour he works, he is paid a rupee. How
much shall he get if he copies 45 pages?
(A) 40
(B) + 27
(C) ₹ 12
(D) * 30
13. A boy gets 2 hours every correct aim at a​

Answer 1

Answer:

A note book is 10₹

Step-by-step explanation:

The cost of 5 books and 4 note books is 100

The cost of 1 book is 12₹ the then the cost of 1 note book is 10₹ .Because 5 books cost is 12.

12×5 =60.The remaining money is 40 and 4 note books.

If we divide 4/40 we get the answer is 10.

so,answer is 10

Answer 2

Answer:

11) c) Rs 10

12) b) Rs 27

Step-by-step explanation:

Solution 11

Let the cost of one notebook be x.

Then,

4x + 5(12) = 100

4x + 60 = 100

4x = 100 - 60

4x = 40

x = 40/4

x = 10

So the cost of one notebook is Rs 10.

Solution 12

Number of pages copied in 45 hours = 75

Time taken to copy 1 page = 45/75 = 3/5 hours

Time taken to copy 45 pages

= 3/5 × 45 = 27 Hours

Money given for working for 1 hour 4 = 1 Rs

Money given for working for 27 hours = 27 Rs

So he shall get Rs 27.