# The image below displays that the water leakage happens from the bottom of the trough at a constant rate. 2hrs later, the level of the water has fallen by 20cm. How many more mins will it take for the trough to empty completely?

# V = 30 times ( ( 40 times (80+120)/2 ) + 120 times 20) = 122400

# cubic cm

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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.

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