Page 205 - Math_Genius_V1.0_C5_Flipbook

E:\Working\Focus_Learning\Math_Genius_5_(05-10-2023)\Open_Files\CHAP_10
\\November 22, 2023 5:02 PM Surender Prajapati Proof 4 Reader _________________________ Date: ___________________74

In such situation, first find the cost of one article and then the cost of required number
of articles.

Here, the cost of 4 candles = `32
pack of
32 4 candles
So, the cost of 1 candle will be `(32 ÷ 4) = ` = `8
4
So, the cost of 10 candles will be `(8 × 10) = `80.

Thus, Swastik will pay `80 for 10 candles of the same kind.
example 3: The cost of 2 dozen of bananas is `120. What will be the cost of 6 bananas?

Solution: The cost of 2 dozen bananas = `120

So, the cost of 1 banana = ` 120 = `5 ( 2 dozen = 24)
24
Therefore, the cost of 6 bananas will be `(5 × 6) = `30.

Practice time 10a

1. 1 dozen erasers cost `36. Find the cost of:

(a) 3 erasers (b) 6 erasers (c) 9 erasers

2. If 5 kg of rice costs `325, then find the cost of 8 kg of rice.
3. 5 pens cost `20. Find the cost of 8 such pens and then 15 pens.

4. 35 apples cost `245. Find the cost of 15 apples.
5. The cost of 18 books is `2250. Find the cost of 4 books.

6. 12 kg of onions cost `72. Find the cost of 27 kg of onions.
7. The cost of 4 shirts is `600. Find the cost of one dozen shirts.
8. Mr Gupta earns `630000 in 9 months. How much will he earn in 3 years?

Profit and loss

Ramesh bought flowers from a wholesaler for `10 per kg.

He then sells them in a village's weekly market for `15 per kg
by making garlands from flowers.

He then sells them for `15 per kg. This is the selling price (SP).

Therefore, cost price = `10, selling price = `15.

Thus,

Š The price at which an article (item) is bought is called the
cost price (CP).

Š The price at which an article or item is sold is called the selling price (SP).

Mathematics-5 203