Given,Let the cost price of single book be Rs. 100.
The cost price of (9 + 1) = 10 pair i.e. 20 books = Rs. (100 × 20) = Rs. 2000.He gets profit of 26%.
So, the selling price of 9 pair i.e. 18 books = Rs. 2000 × (126/100) = Rs. 2520
Then,the selling price of single book = Rs. 2520/18 = Rs. 140
He gives 20% discount on the marked price of a book.
That means, when the selling price is Rs. 80 then the marked price is Rs. 100.
?When the selling price of single book is Rs. 140, the marked price = Rs. 140 × (100/80) = Rs. 175
?The percentage increase in marked price from the cost price = (175 ?100)% = 75%
We have the important relation, More work, More time (days)
? A piece of work can be done in 6 days.
? Three times of work of same type can be done in 6 x 3
= 18 days
? = 750.0003 ÷ 19.999
? ? ? 750 ÷ 20
? ? ? 375 ? 38
Subtract 20, 25, 30, 35, 40, 45 from successive numbers. So 0 is wrong.
NA
Each previous number is multiplied by 2.
? 8 m shadow means original height = 12 m
? 1 m shadow means original height = 12/8 m
? 100 m shadow means original height = (12/8) x 100 m
= (6/4) x 100 = 6 x 25 = 150 m
Let 8% of 96 = y of 1/25
? (8 x 96)/100 = y/25
? y = (8 x 96 x 25)/100 = 192
Since the principal is not given, so data is inadequate.
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