exam Maths Puzzle Numerical Ability

If a farmer can see 12 miles from a firetower, How many square miles can he see?

Is 75.36 right?

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exam Other Question

how many gallons of a 12% solution must be mixed with 6 gallons of a 20% salt solution to obtain a 15% salt solution? At 9:30 a.m. Andrew left Exeter for Portsmouth, cycling at 12 mi/hr. At 10:00 a.m. Stacy left Portsmouth for Exeter, cycling at 16 mi/hr. The distance from Exeter to Portsmouth is 20 mi. Find the time when they met.