Free GMAT Practice Question

Question 1 of 1
ID: GMAT-QR-PS-070
Section: Quantitative Reasoning - Problem Solving (PS)
Topic: Speed/Time/Distance
Difficulty level: Medium

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Ravi cycles from his flat to a lake along a certain road at a constant speed of $10$ kilometres per hour, and returns to his flat along the same road at a constant speed of $30$ kilometres per hour. The whole outing, out and back, takes him $2$ hours of cycling. How many kilometres is the lake from his flat?

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