arrow
arrow
arrow
On selling 17 balls at Rs. 720, there is a loss equal to the cost of 5 balls. What is the cost price of a ball?
Question

On selling 17 balls at Rs. 720, there is a loss equal to the cost of 5 balls. What is the cost price of a ball?

A.

Rs. 45

B.

Rs. 40

C.

Rs. 60

D.

Rs. 55

Correct option is C

Given
Selling price of 17 balls = Rs. 720.
Loss = Cost price of 5 balls. 
Formula Used: 
Loss = CP - SP
Solution:
Let C be the Cost price of one ball 
As we know,
Selling Price of 17 balls=Cost Price of 17 balls − Loss
720 =17 − 5 C
720 = 12 C
72012\frac{720}{12}​​
= 60
Thus, the cost price of one ball is Rs.60

Free Tests

Free
Must Attempt

CBT-1 Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

CBT-1 General Awareness Section Test 1

languageIcon English
  • pdpQsnIcon40 Questions
  • pdpsheetsIcon30 Marks
  • timerIcon25 Mins
languageIcon English
test-prime-package

Access ‘RRB JE’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
354k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow