ICSE Class 10CISCE
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty

Mr. Mehra Sends His Servant to the Market to Buy Oranges Worth Rs 15. the Servant Having Eaten Three Oranges on the Way. Mr. Mehra Pays Rs 25 Paise per Orange More than the Market Price. Taking X to B - ICSE Class 10 - Mathematics

Login
Create free account


      Forgot password?

Question

Mr. Mehra sends his servant to the market to buy oranges worth Rs 15. The servant having eaten three oranges on the way. Mr. Mehra pays Rs 25 paise per orange more than the market price.
Taking x to be the number of oranges which Mr. Mehra receives, form a quadratic equation in x. Hence, find the value of x.

Solution

Number of oranges = y
Cost of one orange = Rs 15/y

The servant ate 3 oranges so Mr. Mehra received (y - 3) oranges.

So x = y - 3 => y = x + 3 ....(1)

The servant ate 3 oranges, so Mr. Mehra received (y - 3) oranges.

So x = y - 3 => y = x + 3 ....(1)

Cost of one orange paid by Mr. Mehra = Rs `15/y + 0.25`

`= Rs 15/(x + 3) + 1/4` [Using (1)]

Now Mr. Mehra pays a total of Rs 15

`(15/(x + 3) + 1/4) xx x = 15`

`(60 + x + 3)/(4(x + 3)) xx x = 15`

`63x + x^2 = 60x + 180`

`x^2 = 3x - 180 = 0`

(x + 15)(x - 12) = 0

x = -15,12

But the number of oranges cannot be negative So x = 12

  Is there an error in this question or solution?

APPEARS IN

 Selina Solution for Selina ICSE Concise Mathematics for Class 10 (2018-2019) (2017 to Current)
Chapter 6: Solving (simple) Problems (Based on Quadratic Equations)
Ex.6D | Q: 8
Solution Mr. Mehra Sends His Servant to the Market to Buy Oranges Worth Rs 15. the Servant Having Eaten Three Oranges on the Way. Mr. Mehra Pays Rs 25 Paise per Orange More than the Market Price. Taking X to B Concept: Quadratic Equations.
S
View in app×