Question

Amisha bought a number of books for Rs. 1800. If she had 10 more books for the same amount each book would have cost her Rs. 30 less. How many books did she buy originally.
​

Answer 1

Answer:

Let x be no. of books

According to the question

x+10

1200

=

x

1200

−20

⇒1200[

x

1

−

x+10

1

]=20

⇒

x

1

−

x+10

1

=

60

1

⇒

x(x+10)

x+10−x

=

60

1

⇒600=x

2

+10x

=x(x+10)=600

∴x=20

Hopefully it's help you.................

Have a great day...................