weight of water when full --- x kg
weight of empty tank ------- y kg
(1/2)x + y = 310 **
(3/4)x + y = 450 ***
subtract: *** - **
(1/4)x = 140
x = 560
back in **
280 + y =310
y = 30
the tank weighs 30 kg
A rectangular tank weighs 310kg,when it is half full of water and 450kg ,when it is three quarter full of water.What is the weight of the empty tank?
5 answers
How did the 280 come about?
Substitute 560 into equation** I.e (1/2) × 560=280
The 560 and the 280 i dont really know how they come about
140×4=560
1 answer