Aptitude - Profit and Loss - Discussion
Discussion Forum : Profit and Loss - General Questions (Q.No. 3)
3.
If selling price is doubled, the profit triples. Find the profit percent.
Answer: Option
Explanation:
Let C.P. be Rs. x and S.P. be Rs. y.
Then, 3(y - x) = (2y - x) 
y = 2x.
Profit = Rs. (y - x) = Rs. (2x - x) = Rs. x.
 Profit % = |
 |
x | x 100 |  % = 100% |
| x |
Video Explanation: https://youtu.be/dPzF10mGsWE
Discussion:
309 comments Page 19 of 31.
Bharathi said:
10 years ago
Hi, l am Bharathi, how comes 3 (y-x) and (2y-x).
Piyush soni said:
10 years ago
Let cp =10 and sp=20.
Know sp doubles = 40.
And profit triples = 3p.
We know that p = sp - cp.
According to question.
3p = sp - cp.
3(40 - 10) = 40 - 30.
30 = 30.
Know sp doubles = 40.
And profit triples = 3p.
We know that p = sp - cp.
According to question.
3p = sp - cp.
3(40 - 10) = 40 - 30.
30 = 30.
Nagendrababu said:
10 years ago
cp = x sp= y profit = sp - cp so profit=y - x -->(1)
sp = 2times and profit= thrice from given data.
So that sp = 2y and (profit) is 3(y-x) from (1) so that,
3(y - x) = 2y - x.
sp = 2times and profit= thrice from given data.
So that sp = 2y and (profit) is 3(y-x) from (1) so that,
3(y - x) = 2y - x.
Arun vihari said:
10 years ago
3(y - x) = 2y - x.
Above, 2y is ok, but why (-x)?
Above, 2y is ok, but why (-x)?
Saranyakumar said:
10 years ago
Thank you for the clear explanation @Balaji.
Garv said:
10 years ago
When you are doubling the selling price then why the cost is not increased in proportion to the same. How can you keep it fixed? Kindly explain.
And the equation be 2y - 2x instead to 2y - x.
And the equation be 2y - 2x instead to 2y - x.
Anurag srivastava said:
10 years ago
Let C. P is x answer S. P is y and initial profit is 10.
We know that S. P - C. P = Profit.
y - x = 10-> Eq 1.
According to given condition, if S. P Double profit become thrice of initial profit then, new S. P. Is 2y and profit is 30 and cost price is same as above x.
Now, 2y - x = 30 -> Eq 2.
By solving these two equation, we get x = 10 and y = 20.
So profit % = (y - x) /x= (20 - 10) /10 =100% this is a basic approach.
We know that S. P - C. P = Profit.
y - x = 10-> Eq 1.
According to given condition, if S. P Double profit become thrice of initial profit then, new S. P. Is 2y and profit is 30 and cost price is same as above x.
Now, 2y - x = 30 -> Eq 2.
By solving these two equation, we get x = 10 and y = 20.
So profit % = (y - x) /x= (20 - 10) /10 =100% this is a basic approach.
Mangai said:
10 years ago
@Tushar Vaibhav.
You explained clearly and It is easy when to compare to others.
You explained clearly and It is easy when to compare to others.
Gopi Krishnan said:
10 years ago
Thanks for good explanation. Now I got it.
Rahul said:
10 years ago
Apply,
SP = (100 + gain%) * cp/100.
SP = (100 + gain%) * cp/100.
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