exam Maths Puzzle Numerical Ability

Find the radius of a circular arc of length 12cm that subtends a central angle of radian measure 1.5.

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exam Other Question

can you help me determine if the following problem is rational or irrational
sqrt(48)??? Gian and Arwin can finish a project in 4 2/3 hours. Gian can do it alone in half as much as time arvin can do the job. how long will it take arwin to do the job alone.