exam Maths Puzzle Numerical Ability

SQRT(3X+1) - SQRT (X-1)= 2, SOLVE COULD BE 2 ANSWERS

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exam Other Question

sqrt(a^2/b^2) please help me, i have no idea how to do this.... A cable to the top of a tower makes an angle of 35 deg with the lower ground. At a point 100 yards closer to he tower the angle of elevation to the top of the tower is 59 deg. Estimate the length of the cable.