exam Maths Puzzle Numerical Ability

A GARDEN AREA IS 30FT LONG AND 20FT WIDE. A PATH OF UNIFORM WIDTH IS SET AROUND THE EDGE. IF THE REMAINING GARDEN AREA IS 400FT^2 WHAT IS THE WIDTH OF THE PATH?

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exam Other Question

Can someone help me calculate the 20th partial sum for 6400,1600,400,100,25...? The base of a ladder is 3 feet away from the wall. The top of the ladder is 14 feet from the floor. Find the length of the ladder to the nearest thousandth.

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