The S.I of rupees 800 is rupees 216,if the rate percent of interest pa.is 1/3 of the no.of years then the rate per annum is
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Step-by-step explanation:
SOLUTION
Using above two equations, we will find the total cost price of the articles.
Gain% = Profit / CP × 100
=> 10 = (SP - CP)/CP × 100
=> 10 = (660 - CP)/CP × 100
=> 10 = (66000 - 100CP)/CP
=> 10CP = 66000 - 100CP
=> 110CP = 66000
=> CP = 600
Hence the cost price of watch + pen = Rs.600
PART 2: FINDING INDIVIDUAL CP
According to the 2nd case we are given:
Given
Watch SP = Rs.435
Pen SP = Pen CP = Let it be y.
Given
Total Selling price = Rs.(435 + y)
Loss Percentage = 5%
Total CP = Rs.600 (as calculated)
FORMULA:
Loss % = Loss/CP × 100
Loss = Cost Price - Selling Price
SOLUTION
Loss% = Loss/CP × 100
=> 5 = (CP - SP)/CP × 100
=> 5 = [600-(435+y)]/600 × 100
=> 5 = (165 - y)/6
=> 30 = 165 - y
=> y = 165 - 30
=> y = 135
Now, we got the selling price which is equals to the cost price of the pen = Rs.135.
Total cost price = Rs.600
Hence cost price of watch is 600 - 135 = 465
Hence, the cost price of watch is Rs.465