RS Aggarwal Class 8 Math Tenth Chapter Profit and Loss Exercise 10B Solution

RS Aggarwal Class 8 Math Tenth Chapter Profit and Loss Exercise 10B Solution

EXERCISE 10B

(1) The marked price of a water cooler is Rs 4650. The shopkeeper offers an off-season discount of 18% on it. Find its selling price.

(2)  The price of a sweater was slashed from Rs 960 to Rs 816 by a shopkeeper in the winter season. Find the rate of discount given by him.

(3) Find the rate of discount being given on a shirt whose selling price is Rs 1092 after deducting a discount of Rs 208 on its marked price.

(4) After allowing a discount of 8% on a toy, it is sold for Rs 216.20. Find the marked price of the toy.

Solution: Selling price = Rs 216.20

Rate of discount = 8%

(5)  A tea set bought for Rs 528 after getting a discount of 12% on its marked price. Find the marked price of tea set.

(6) A dealer marks his goods at 35% above the cost price and allows a discount of 20% on the marked price. Find his gain or loss per cent.

Solution: Let the cost price be Rs 100.

Then, the market price = Rs (100 + 35) = Rs 135

(7) A cellphone was marked at 40% above the cost price and discount of 30% was given on its marked price. Find the gain or loss per cent made by the shopkeeper.

Solution: Let the Cost price be Rs 100.

Market price = Rs (100 + 40) = Rs 140

(8) A dealer purchased a fan for Rs 1080. After allowing a discount of 25% on its marked price, he gains 25%. Find the marked price of fan.

⇒ 75x = 135000

⇒ x = 1800

Hence, the market price is Rs 1800.

(9) A dealer bought a refrigerator for Rs 11515. After allowing a discount of 16% on its marked price, he gains 20%. Find the marked price of the refrigerator.

⇒ 84x = 1381800

⇒ x = 16450

Hence, the market price is Rs 16450.

(10) A jeweller allows a discount of 16% to his customers and still gains 20%. Find the marked price of a ring which costs the jeweller Rs 1190.

⇒ 84x = 142800

⇒ x = 1700

Hence, the market price is Rs 1700.

(11) After allowing a discount of 10% on the marked price, a trader still makes a gain of 17%. By what per cent is the marked price above the cost price?

Solution: Let the cost price be Rs 100.

Selling price = Rs (100 + 17) = Rs 117

Let the market price be Rs x.

⇒ x = 130

Hence, the market price is (130 – 100) = 30% above the cost price.

(12) How much per cent above the cost price should a shopkeeper mark his goods so that after allowing a discount of 10% on the marked price, he gains 8%?

Solution: Let the cost price be Rs x.

Selling price = Rs (100 + 8) = Rs 108

Let the market price be Rs x.

Hence, the market price is (120 – 100) = 20% above the cost price.

(13) The marked price of TV is Rs 18500. A dealer allows two successive discounts of 20% and 5%. For how much is the TV available?

(14) Find the single discount which is equivalent to two successive discounts of 20% and 5%.

Solution: Let the market price be Rs 100.