**Chapter 8 Comparing Quantities Exercise 8.2**

Question 1.

A man got a 10% increase in his salary. If his new salary is ₹ 1,54,000, find his original salary.

Solution:

The increased salary = ₹ 1,54,000

Increase in salary = 10%

Increase salary = Original salary × (1 + Increase100)

Hence, the original salary = ₹ 1,40,000

Question 2.

On Sunday 845 people went to the Zoo. On Monday only 169 people went. What is the per cent decrease in the people visiting the Zoo on Monday?

Solution:

Number of people visiting the Zoo on Sunday = 845

Number of people visiting the Zoo on Monday = 169

Decrease in number of people visiting the Zoo = 845 – 169 = 676

Decrease per cent

Hence, the decrease per cent = 80%

Hence, the selling price of one article = ₹ 34.80

Question 4.

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

Solution:

CP of the article = ₹ 15,500

Money spent on repairs = ₹ 450

Net CP = ₹ 15,500 + ₹ 450 = ₹ 15,950

Profit = 15%

Hence, the selling price of article = ₹ 18342.50

Question 5.

A VCR and TV were bought for ₹ 8,000 each. The shopkeeper made a loss of 4% on the VCR and a profit of 8% on the TV. Find the gain or loss per cent on the whole transaction.

Solution:

Cost price of a VCR = ₹ 8,000

Loss = 4%

Hence, the shopkeeper gained 2% profit on the whole transaction.

Question 6.

During a sale, a shop offered a discount of 10% on the marked prices of all the items. What would a customer have to pay for a pair of Jeans marked at ₹ 1450 and two shirts marked at ₹ 850 each?

Solution:

Marked Price (MP) of Jeans = ₹ 1,450

MP of two shirts = ₹ 850 × 2 = ₹ 1,700

Total MP = ₹ 1,450 + ₹ 1,700 = ₹ 3,150

Discount = 10%

Thus, the customer will have to pay ₹ 2,835.

Question 7.

A milkman sold two of his buffaloes for ₹ 20,000 each. On one he made a gain of 5% and on the other a loss of 10%. Find his overall gain or loss. [Hint: Find CP of each]

Solution:

SP of a buffalo = ₹ 20,000

Gain = 5%

Question 8.

The price of a TV is ₹ 13,000. The sales tax charged on it is at the rate of 12%. Find the amount that Vinod will have to pay if he buys it.

Solution:

Marked price of the TV = ₹ 13,000

ST = 12%

The required amount that Vinod has to pay = ₹ 14,560