not square litres but square metres 80 x 0.30482 = 7.432 metres2
to work out litres need to know the depth, depth in metres x 7.432/1000 will give litres
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1359.2 litres, approx.
1 acre = 43,560 square feet If the sides of the pond are straight ... its cross section area is 1/4 acre all the way down to the bottom ... then its volume is (43,560/4) x (5) = 54,450 cubic feet = 407,314.3 gallons
i need help
Well, isn't that a happy little question! To convert centiliters to liters, you simply move the decimal point two places to the left. So, 60 centiliters is equal to 0.6 liters. Just imagine that as a small, peaceful stream flowing into a gentle pond.
It's unlikely that your pond has vertical sides and is 3' deep everywhere, but if it were, it would hold 18 * 7 * 3 = 378 cu. ft. of water. Converting the dimensions to metric at the start makes everything easier. 378 * (12^3) * (2.54^3) give you the number of cc's, dividing that by 1000 gives you the number of liters (10703). Dividing THAT by 3.7854 (liters/gallon) gives you about 2828 gallons. A typical pond, however, probably slopes from very shallow at the periphery to maximum depth near the center. This means it likely holds 30 - 40% less than if it had steep vertical sides and a consistent depth (like a typical above-ground pool). Your pond is probably on the order of 1500 - 1900 gallons.