00:01
In the given question we are told that a shopkeeper marked a book at a price of 720 rupees.
00:08
So marked price of the book is rupees 720 and we are told that he gave two successive discounts of 10 % and 20%.
00:25
So he gave two successive discounts.
00:28
Discounts of 10 percentage and 20 percentage right so this means on the price of 720 he first gave a discount of 10 percentage so let's just find what is 10 percentage of 720 so 10 percentage of 720 is 10 by 100 times 720 right so 10 by 100 times 720 is 72 rupees.
01:12
So after 10 percentage discount the price would be 720 minus the discount.
01:26
Right so this would give us the price of the book as 648 and now he gives the person another discount of 20 percentage so 20 percentage of 648 is 20 by 100 times 648 so when we take 20 by 100 times 648 so when we take 20 by 100 times 648 we get a price of 129 .6 rupees so then we can write after the 20 percentage discount after the 20 percentage discount after the 10 percentage discount the final price now after both the both successive discounts is 648 minus is 129 .6 and that is 518 .4 rupees.
02:36
So this is the price of the book now.
02:40
And now in the question we are told that if the cost price of the book was 432, what is the shopkeeper's profit? so cost of the book, cost price of the book.
02:55
The book was was uh rupees 432 so profit is 518 the price that he sold it for minus the cost price that he had the cost price is the price that he bought the book for so 518.
03:28
Point four minus 4332 gives us the profit that the shopkeeper made as 86 .4 rupees.
03:41
So this is how we find the profit over here.
03:46
How to take successive discounts is just simple...