exam Maths Puzzle Numerical Ability

Solve:

2sinx+2cosx=sqrt2

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exam Other Question

1. Painting: A cylindrical tank has a radius of 6.5 ft. and an altitude of 14 ft. If a gallon of paint will cover 120 ft^2 of surface, how much paint is needed to put two coats of if GI = 3, IH = 8, JK = 10, what is JI (if it is longer than IK)?