exam Maths Puzzle Numerical Ability

A deep sea diving bell is being lowered at a constant rate. After 8 minutes, the bell is at a depth of 300 feet. After 35 minutes the bell is at a depth of 2000 feet. What is the

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The length of a rectangle is 4 cm more than the width. The area is 45 cm ^ 2. Find the length and width. can you please help me find the inverse of j(x)=(2x+5)/(x-2)