Simple equality with constant speed.

3 miles/15 minutes = X miles/25 minutes

cross multiply

15X = 75

**X = 5 miles**

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Simple equality with constant speed.

3 miles/15 minutes = X miles/25 minutes

cross multiply

15X = 75

**X = 5 miles**

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The only way this boy maintain a constant speed is on a bike in the gym!

But hey - never mind the details let’s get on with the question.

If you’re not good with numbers - the best thing to do before you start is think about the question and have an idea of what the answer is going to look like - so...If the boy travels 3 miles in 15 minutes if you double that he will travel 6 miles in **30 minutes.**

But we only want to know the answer if he keeps going for **25 minutes **- we know its going to be a *little bit less* than six miles

15 minutes for 3 miles - how long for 1 mile? -15 minutes divided into 3 equal parts = 5 mins

The boy goes 1 mile in 5 minutes so he will go 5 miles in 25 minutes.

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