The cost price of 20 articles is the same as the selling price of x articles. If the profit is 25% then determine the value of x.

Answer: Option C

Explanation:

Whenever we get this type of question, we should have formula in mind that,
Gain% = (gain/cost)*100

Cost = 4700 + 800 = Rs. 5500
S.P. = Rs. 5800

Profit = 5800 - 5500 = 300
$$\begin{aligned} Gain\% = \frac{300}{5500}*100 \\ = 5\frac{5}{11}\% \end{aligned}$$

Answer: Option B

Explanation:

Let the cost of Production = Rs. P
Then, as per question,

$$\begin{aligned} => \left( \frac{125}{100} *\frac{115}{100}*\frac{110}{100} * P \right) = 1265\\ => \frac{253}{160}P = 1265 \\ => P = 800 \end{aligned}$$

Answer: Option C

Explanation:

Let the new S.P. be x, then.
(100 - loss%):(1st S.P.) = (100 + gain%):(2nd S.P.)

$$\begin{aligned} =>\left( \frac{95}{1140} = \frac{105}{x} \right) \\ => x = 1260 \end{aligned}$$

Answer: Option A

Explanation:

Please note in this type of questions, get the value of 1 kg to solve this question, lets solve it.

C.P. of 1 Kg = 420/70 = Rs. 6
Selling Price = 6.50
Gain = Rs. 0.50

$$\begin{aligned} Gain\% = \frac{.50}{6}*100 \\ = 8\frac{1}{3}\% \end{aligned}$$

Answer: Option C

Explanation:

From the question it is clear that, Gain is 20%
From 1, it is clear that S.P. - C.P. = 40, so it is sufficient to get answer.
While 2 is not sufficient to get answer.