ZJSG09112007
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I need help with these questions.
Please show workings.

Question 1:
A trader made a profit of 20% on a radio which he sold for N144 .Calculate the cost price of the radio .

Question 2:
A motor dealer sold a car at a loss of 20% by selling it at N10,000 . Find the cost price.


Note :
Cost price formula :
[tex]C.P = S.P-P \\ or S.P+L[/tex]
Selling Price Formula :
[tex]S.P = C.P + P \\ or C.P - Loss[/tex]
Profit Percentage ( P% ) formula :
[tex] P \% = P/C.P × 100 \\ l \% = l/C.P × 100[/tex]
​

Respuesta :

mhanifa

Answer:

Question 1

Given

  • SP = 144
  • P = 20%
  • CP = x

Use formula and solve for x:

  • SP = CP + P
  • 144 = x + (20% of x)
  • 144 = x + 0.2x
  • 144 = 1.2x
  • x = 144/1.2
  • x = 120

Cost price is N 120

Question 2

Given

  • SP = 1000
  • P = -20% (negative because of loss)
  • CP = x

Use formula and solve for x:

  • SP = CP + P
  • 10000 = x - (20% of x)
  • 10000 = x - 0.2x
  • 10000 = 0.8x
  • x = 10000/0.8
  • x = 12500

Cost is N 12500

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