After a mark-up of #40%# was added to an item a boy sells it for #Rs.35#. What was his cost price and how much was his mark-up?

Answer 1

The cost price is Rs.25 and the markup is Rs.10.

The important thing to note here is that you cannot just find 40% of Rs.35 and subtract it.

The boy's cost price represents 100%, onto which 40% is added to give Rs.35.

Therefore Rs.35 represents #140%# of the cost price and we need to find the value of the 100% and the 40%.

Using direct proportion:

#35/140 = x/100#
#x = (35xx100)/140#
#x = 25" "larr# this is the cost price.
#35-25 = 10" "larr# this is the mark up
Make an equation Let the cost price be #p#
#140% xx p = 35#
#140/100 xx p= 35#
#p = 35 xx 100/140#
#p = 25#
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Answer 2

The cost price of the item was Rs. 25 and the markup was Rs. 10.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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