exam Maths Puzzle Numerical Ability

what is the length of a rectangle that is twice the width; with a perimeter that is 42 inches. find the width

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exam Other Question

840 meters in 15 seconds____ meters in 3 seconds A bicyclist rode into the country for 5 hours. In returning, her speed was 5 miles an hour faster and the trip took 4 hours. what was her speed each way?