book Maths Puzzle Numerical Ability

The Jones family drove to Disneyland at 50 mph and returned on the same route at 40 mph. find the distance to Disneyland if the total driving time was 7.2 hours.

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book Other Question

Find the value of a if the points whose coordinates are given are the indicated distance apart.
(-2,-5)(a,7);d=13
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a bicyclist rode into the country for 5 h in returning her speed was 5 mi/h faster and the trip took 4h what was her speed each way?