book Maths Puzzle Numerical Ability

5 square root 20 + square root 24 - square root 180 + 7 square root 54

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A box is being pulled by means of two ropes. One rope exerts 100 pounds of force at 28degrees above the horizontal. The other rope exerts 58 pounds of force at 23degrees below the 4b+1=17 2d+1=19