Asked by Krystle
A 3m high fence is on the side of a hill and tends to lean over. The hill is inclined at an angle of 20 degree to the horizontal. A 6.3 m brace is to be installed to prop up the fence. It will attached to the fence at a height of 2.5 m and will be staked downhill from the base of the fence. What angle, to the nearest degree, does the brace make with the hill?
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