Ratio and Rate
2010-05-10 12:42 am
The ratio of the capacities of a large tank to that of a small tank is 7:2, If the large tank is 5L more than that of the small tank, find the capacity of the small tank.
回答 (3)
2010-05-10 12:58 am
✔ 最佳答案
Let the capacity of the small tank = XTherefore ( 7 / 2 ) = ( 5+X ) / X
so 7X = 2 ( 5+X)
==> 7X - 2X = 10
===> 5X = 10
=====> X = 2 ( L )====> the capacity of the small tank
2010-05-10 3:31 am
let the small tank be x L.
(x+5)/x=7/2
x+5=3.5x
2.5x=5
x=2
so the capacity of the small tank is 2L.
(x+5)/x=7/2
x+5=3.5x
2.5x=5
x=2
so the capacity of the small tank is 2L.
2010-05-10 12:50 am
Let the capacities of a large tank =7kL
and the capacity of the small tank =2kL
7k=2k+5
5k=5
k=1
the capacity of the small tank=2L
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