exam Maths Puzzle Numerical Ability

It took the pilot a hour and a half to make a flight of 240 miles when flying against the wind. If the return trip took an hour and 12 minutes, what was the speed of the wind?

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exam Other Question

write the expression 3log3x+2log3y-1/3log3x6-log1231 as a logarithm of a single quantity. If there were no air resistance, then the height(in feet) above the earth for a skydiver t seconds after jumping from an airplane at 10,000 feet would be given by

h(t) = -16t^2