In oil pipeline construction, the cost of pipe to go underwater is 60% morethan the cost of pipe used in dry-land situations. A pipeline comes to a riverthat is 1 km wide at point A and must be extended to a refinery, R, on theother side, 8 km down the river. Find the best way to cross the river (assumingit is straight) so that the total cost of the pipe is kept to a minimum. (Giveyour answer correct to one decimal place.)