Question

the Marked price of a book is rupees 360 the dealer offers a discount of 10% and still makes a profit of 20% find selling price and cost price
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Answer 1

Answer:

Cp= rs.270

Sp= rs.324

Step-by-step explanation:

Given:

Mp = rs.360

D% = 10%

P%= 20%

Solution:

Sp= Mp - D% of Mp

= rs.360 - 10/100×₹360

= ₹360 - ₹36

= ₹ 324

Therefore, sp= ₹324

Sp = (1+p%/100)×cp

₹324 = (1+20/100)×cp

₹324 = ( 12/10 ) × cp

(₹324 × 10)/12 = cp

₹3240/12 = cp

₹270 = cp

Therefore,

Cp = ₹270

Sp = ₹324

Answer 2

Step-by-step explanation:

mp=360

D=10%

sp=?

sp=(1-d/100)*mp

=(1-10/100)*360

=(100-10/100)*360

=90/100*360

=Rs 324

sp =Rs 324

profit =20%

sp =(1+p/100)*cp

324 =(1+20/100)*cp

324=(100+20/100)*cp

324=120/100*cp

cp =324*100/120

cp =54*5

cp. =Rs 270

hope this will help you