Police officer A patrols 36 streets in 4 hours. His colleague, officer B, patrols 55 streets in 5 hours. How many streets will both officers patrol in one hour?
Let’s work this out in a step by step way to be sure we have the right answer.
20
Officer A patrols 36 streets / 4 hours = 9 streets / hour.

Officer B patrols 55 streets / 5 hours = 11 streets / hour.

Together officer A and B patrol 9 streets / hour + 11 streets / hour = 20 streets / hour.

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Therefore, the answer is 20