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?
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.
Using direct proportion:
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The cost price of the item was Rs. 25 and the markup was Rs. 10.
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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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