A surveyor needs to determine the height of a large grain silo. He positions his transit 65 m from the silo and records an angle of elevatio

A surveyor needs to determine the height of a large grain silo. He positions his transit 65 m from the silo and records an angle of elevation of 52°. If the height of the transit is 1.7 m, determine the height of the sili, to the nearest metre.