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Example 7: Vasu, a toy store owner, bought a toy train for `1880 and sold it at a profit of
`225. Find its selling price.

Solution: CP of the toy train = `1880, Profit = `225
SP = CP + Profit

= `1880 + `225 = `2105

Hence, the selling price of the toy train is `2105.
Example 8: A shopkeeper bought 5 kg of oranges at `70 per kg and sold all of
them at a profit of `135. What was the selling price of the oranges per kg?

Solution: CP of the oranges = `(70 × 5) = `350

Profit earned = `135
SP = CP + Profit = `350 + `135 = `485
Now, SP of 1 kg of oranges = `(485 ÷ 5)

485
= ` = `97
5
Thus, the selling price of 1 kg of oranges is `97.

Think Tank Critical Thinking
A fruit seller buys bananas for `60 per dozen and sells them for `15 for every 3
bananas. Does he make a profit or a loss?

Practice time 10B

1. Tick (3) the correct option.

( a) Profit = ______________.

(i) SP – CP (ii) CP – SP
(iii) SP + CP (iv) SP = CP

( b) CP = ______________.

(i) SP – Profit (ii) SP + Profit
(iii) SP + Loss (iv) Either (i) or (iii)

( c) If CP is greater than SP, then there is:

(i) a loss (ii) a profit
(iii) both (i) and (ii) (iv) no loss, no profit

( d) If selling price = `100 and cost price = `108, then profit or loss is:
(i) loss, `4 (ii) profit, `8

(iii) loss, `8 (iv) No loss no profit

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