book Maths Puzzle Numerical Ability

The length of a rectangular room is 5 feet more than 3 times the width.Find the dimensions if the perimeter is 62 feet.

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book Other Question

consider- log3 135 *log3 15
can this be written as (log3 135*15)raised to the power2 ?
A fisherman takes his boat out to sea and then back to the harbor. The entire trip lasts 8 hours. If he travels out at 18 mph and follows the same route back at 14 mph, how many miles does he travel altogether?