? 1 dozen = 12
? 1/4 dozen = 1/4 x 12 = 3
? Cost of 3 bananas = Rs. 2.35
? Cost of 1 banana = Rs. 2.35/3
? Cost of 42 x 12 bananas = (2.35 x 42 x 12 ) / 3
= Rs. 394.80
= Rs. 400 (Approximately)
1 kg = 1000 grams
? 1/4 kg = 1000 / 4 = 250 grams
Now Cost for 200 grams = (200 / 250 ) x 60 paise
= 48 paise
Let the cost of the table be Rs. x and the cost of the chair = Rs. y
From 1st condition,
2x = 5y
? x= 5y/2
From 2nd condition
x - y = 1200
? (5y / 2) - y = 1200
3y / 2 = 1200
y = Rs. 800
Let the selling price of each article be Rs. 1. Then, selling price of 100 articles= Rs. 100, profit on selling 100 articles= Rs. 75, and cost of 100 articles=100-75=Rs.25
Therefore, profit percentage=(75 / 25) x 100=300%
If CP be Rs. 1g, then he pay Rs. 1200 for 1000 g
Again he obtains Rs. 1200 for 1000 g (by selling at 20% profit) Thus there is no loss no gain.
K = 1 litre, price of K = 1
P = 4 litre price of P = 2
price of total (new) mixture = 1 X 1 + 4 X 2 = Rs. 9
price of pure petrol of same quantity = 5 X 2 = Rs. 10
Percentage profit = [(10-9) / 9] x 100 = 111/9 %
? Total cost of 7000 bricks = 5740 + 805 = Rs. 6545
? Total cost of 1 brick = Rs. 6545/7000
? Total cost of 1000 bricks = (6545 / 7000) x 1000
= Rs. 935
49 dozen = 49 x 12 = 588
? The cost of 357 mangoes = Rs.1517.25
?The cost of 1 mangoes 517.25 / 357 = Rs. 4.25
? The cost of 588 = Rs. 2499
= Rs. 2500 (Approximately)
S.P. = Rs. 100, gain = Rs. 10
? C.P. = S.P. - gain = Rs. 90
? Gain% = (10 / 90) x 100 % = 111/9%
S.P. = Rs. 247.50
Gain = 25 / 2%
? C.P. = Rs. {100 / (100 + 25 / 2) x 247.50}
= Rs. (100 x 2 / 225 x 247.50)
= 220
Let C.P. of each table = Re. 1
C.P. of 20 tables = Rs. 20
S.P. of 20 table = C.P. of 15 tables = Rs. 15
? loss = (5/20) x 100 % = 25%
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