NCERT Class 8 Mathematics Solutions: Chapter 8 – Comparing Quantities Exercise 8.2 Part 1

Download PDF of This Page (Size: 155K)

Profit and loss formula

Profit and Loss Formula

Profit and loss formula

Question: 1 A man got 10% increase in his salary. If his new salary is Rs. 1, 54,000 find his original salary.

Answer:

Let original salary be Rs. 100

Therefore, new salary i.e. 10% increase

Here, New salary = 1, 54,000

Original salary =

Hence original salary is Rs. 1, 40,000.

Question: 2 On Sunday 845 people went to the Zoo. On Monday only 169 people went. What is the percent decrease in the people visiting the Zoo on Monday?

Answer:

People went to Zoo on Sunday

People went to Zoo on Monday

Number of decrease in the people

Decrease

Hence decrease in the people visiting the Zoo is 80%.

Question: 3 A Shopkeepers buys 80 articles for Rs. 2400 and sells them for a profit of 16%. Find the selling price of one article.

Answer:

No. of article = 80

Cost of articles and profit

Profit

Selling price

SP of 1 article

Question: 4 The cost of an article was Rs. 15,500, Rs. 450 were spent on its repairs. If it sold for a profit of 15%, find the selling price of the article.

Answer:

Here, C.P = Rs. 15,500 and repair cost = Rs. 450

So, total cost price

Profit

Selling price