Question

7. Sia bought a laptop for 35,000. At what price should she sell it to make a profit of 8%?
8. Mr Roy bought a car for 85,800. He spent 20,200 on its stereo and other accessories and then
sold it at a profit of 15%. Find the selling price of the car.
9. If the selling price of 8 oranges is equal to the cost price of 12 oranges, find the profit percent.​

Answer 1

$\underline{\boxed{\bold{Question}}}$

7)Sia bought a laptop for 35,000. At what price should she sell it to make a profit of 8%?

8)Mr Roy bought a car for 85,800. He spent 20,200 on its stereo and other accessories and then sold it at a profit of 15%. Find the selling price of the car.

9)If the selling price of 8 oranges is equal to the cost price of 12 oranges, find the profit percent

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$\underline{\boxed{\bold{Answer}}}$

7) 37,800

8)1,21,900

9) 50%

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$\underline{\boxed{\bold{Explanation}}}$

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$\huge\red{7) given}$

cost of price = RS 35,000

profit =8%

selling price of laptop

Formula:

s.p=c.p+profit % of c.p

=35,000+8%×35,000

=35,000+0.08×35,000

=35,000+2,800

=37,800

Hence, the price of laptop =Rs 37,800

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$\huge\blue{8) given}$

Cost of car =85,800

His spends=20,200

Total price of car =RS(85,800+20,00)

1,06,000

profit = 15%

Find the selling price of car

Formula:

s.p=c.p+profit % of c.p

=1,06,000+15%×1,06,000

=1,06,000×15,900

=1,21,900

Hence , selling price of car =RS 1,21,900

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$\huge\green{9) given}$

s.p of 8 oranges = c.p of 12 oranges

c.p of 12 oranges = RS 8

s.p of 8 oranges = RS 12

Formula:

Profit =s.p-c.p

=12-8

=4%

Formula:

Profit % = profit × 100/c.p

=$4×\frac{100}{8}$

=50%

Hence , the selling price of orange =50%

[Hope this helps you.../]