exam Maths Puzzle Numerical Ability

FIND THE SURFACE AREA OF A CUBE WITH EDGES OF 9 METERS.

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exam Other Question

answer for this problem x+7/x=8 My question is, if a bicyclist rode into the country for 5 h. Once returning, what was the speed if the person was traveling 5 mi/h faster and the trip took 4 h. What was the speed going each way?