Aptitude - Profit and Loss - Discussion

Discussion Forum : Profit and Loss - General Questions (Q.No. 7)
7.
A shopkeeper expects a gain of 22.5% on his cost price. If in a week, his sale was of Rs. 392, what was his profit?
Rs. 18.20
Rs. 70
Rs. 72
Rs. 88.25
Answer: Option
Explanation:

C.P. = Rs. 100 x 392 = Rs. 1000 x 392 = Rs. 320
122.5 1225

Profit = Rs. (392 - 320) = Rs. 72.

Video Explanation: https://youtu.be/a36nJFgh5yk

Discussion:
99 comments Page 6 of 10.

Phub said:   9 years ago
Gain% = 22.5; S.p =392.

C.P = (100/(100 + Gain%) * S.P).
C.P =(100/ (100 + 22.5) * 392) = 320.
So, profit = S.p - C.p = 392 - 320 = 72.
(1)

VAsU rEdDy said:   9 years ago
Cross multiply,

122.5 ---------> Rs. 392
100 -----------> ??

Ans: 320

==> Profit = 390 - 320

Aayush said:   9 years ago
Thank you all for explaining this solution.

Lucky said:   9 years ago
Short Trick to Solve this Question is likewise.

We know Selling Prize is 392 & Profit Percentage 22.5 %.
So,

CP = SP * P/100.

= 392 * 1225/1000.
= 320.

So, Profit = SP - CP.

P = 392 - 320 = 72.

Note: (If SP & Profit/loss % is given then Cp = SP * 100/P/l%. But, if CP & Profit/loss % is given then Sp = CP * P/L%/100).

Dharsh said:   9 years ago
If the profit percentage in question is mentioned as 15% then where we will assume it as 115
and where we assume it as 15?

Please guide me.

Om Prakash said:   9 years ago
Let C.P = x.

Therefore,

S.P = 22.5% of x + x.

=> (22.5/100) *x +x.
=> x((225/1000)+1).
=> x((9+40)/40).
=> 49x/40.

Acc to question,

(49x/40) = 392.
x = 15680/49.
x = 320.

Therefore, profit = 392 - 320.
=> 72 Ans.

Azly said:   10 years ago
It's given that 22.5% profit is on cost price. So we should take cost as 100%,

Here we go,

Cost price + Profit = Selling price.

100% + 22.5% = 122.5%.

392*22.5/122.5 = 72.
(1)

Kavi said:   1 decade ago
How 1000 came there?

DINESH said:   1 decade ago
Given S.P = 392, expect profit = 22.5%

Let us take C.P = 100.

C.P = (C.P/S.P)*S.P.
S.P = 122.5(EXPECTS).

C.P = (100/122.5)*392(real).
C.P = 320.
P = 392-320 = 72.

Prem g said:   1 decade ago
1225 = 3920.
100 = ?

? = (3920*100)/1225.
C.P = 320.

So profit = 392-320.
= 72 Rs.


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