A cistern is 3/8 filled with water. When 400 liters of water are added, the cistern becomes half full. What is the capacity of the whole cistern?
2007-09-23 02:37:56 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
if 400l + 3/8 fills it by 1/2 then 400l must be 1/8 of the capacity. 400*8 = 3200 so the capacity is 3200 litres
2007-09-23 02:44:14 · answer #1 · answered by Deano 2 · 1⤊ 0⤋
Half the cistern is 4/8 and it was originally 3/8 full. So, 400 litres represents 1/8 and thus the total capacity is 3200 liters.
2007-09-23 09:42:57 · answer #2 · answered by Swamy 7 · 1⤊ 0⤋
Let capacity of whole cistern be x, then
3/8 x + 400 = 1/2 x
Solve for x.
2007-09-23 09:41:48 · answer #3 · answered by rscanner 6 · 1⤊ 0⤋
400 liters = 1/8 capacity, so 8*400 liters=3200 liters, which is its total capacity = 1.
2007-09-23 09:47:36 · answer #4 · answered by Anonymous · 1⤊ 0⤋