Book Maths Puzzle Time Distance and Speed

Two cars leave town at the same time going in opposite directions. one travels at 35 km/h and the other at 55 km/h. in how many hours will they be 200 km apart?

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u/3=1/2u-1 ? 5/m=1=4m/m ? 6/19n=-2/n2+2 ? /=fraction bar To find the height of a tower, a surveyor positions a transit that is 2 m tall at a spot 35 m from the base of the tower. She measures the angle of elevation to the top of the tower to be 58 degrees. What is the height of the tower, to the nearest meter?