Question

ravish bought 100 articles for ₹4000 . he sold 20 of them at a gain of 5% . at what gain percent must he sell the remaning article so as to gain 20% percent on the whole​

Answer 1

Step-by-step explanation:

Let's say the price of the articles be x.

Given that ravish bought 100 articles for ₹4000 and he sold 20 of them at a gain of 5%.

Cost price of 1 article = Rs. 4000

for 100 articles = 4000/100

for 20 articles = 4000/100 × 20 = Rs. 800

As per given question,

→ x = 800 + 5/100 × 800

→ x = 840

Let's say the selling price of all the articles be y.

So,

→ y = 4000 + 20/100 × 4000

→ y = 4800

SP of 80 articles = Rs. (4800 - 840) = Rs. 3960

CP of 80 articles = 40(80) = Rs. 3200

Gain = SP - CP = Rs. (3960 - 3200) = Rs. 760

Gain% on 80 articles = 760/3200 × 100 = 23.75%

Therefore, the gain% is 23.75%.