During a thunderstorm 12 mm of rain fell onto a rectangular roof 16 m by 7 m. The rain ran into a 2 m high cylindrical tank 1.5 m in diameter. If the tank was empty when the rain began, what percentage of it was filled? (to the nearest whole percentage)
+129840 Assuming that every part of the roof received the same amount of rain, the total volume of water falling onto the roof was 12mm x 16m x 7m....and converting mm to m, we have .012m x 16m x 7m = 1.344m 3
And the total volume of the cylinder is pi x r2 x h = pi x (.75m)2 x (2m) = about 3.534m3
So 1.344 / 3.534 = about 38%
+129840 Assuming that every part of the roof received the same amount of rain, the total volume of water falling onto the roof was 12mm x 16m x 7m....and converting mm to m, we have .012m x 16m x 7m = 1.344m 3
And the total volume of the cylinder is pi x r2 x h = pi x (.75m)2 x (2m) = about 3.534m3
So 1.344 / 3.534 = about 38%
