Posted by bob on Wednesday, November 7, 2012 at 1:08pm.
there is a circular tank with diameter 7 min a garden. what will be the cost of fixing fountain pipe all around the tank at the rate of $5 per meter

algebra  Steve, Wednesday, November 7, 2012 at 2:31pm
c = pi d = pi*7 = 22 m
cost = 22m * $5/m = $110