
By: JessicaTan (offline) Sunday, August 05 2012 @ 04:56 AM CDT (Read 961 times)



JessicaTan 
Hi,
I cant solve this question, kindly help me to solve with working solution(ans : 174kg).
Container A and Container B have the same shape and mass. 7/8 of container A and 2/3 of container B are filled with oil. The mass of Container B with its contents is 9/10 the mass of Container A with its contents. The total mass of the two containers with their contents is 570kg. Find the mass of the empty container.
Thanks a lot.

Regular Member
Registered: 10/17/09 Posts: 82





By: echeewh (offline) Monday, August 06 2012 @ 04:46 PM CDT



echeewh 
Hi Jessica,
Following pls find the worked solution:
A = 10u; B = 9u
Total (A+B ) = 19u > 570
1u > 30
A = 10u > 10 x 30 = 300 kg
B = 9u > 9 x 30 = 270 kg
A + (7/8) Oil = 300 kg  (1)
B + (2/3) oil = 270 kg  (2)
Given that A,B are identical, we have ...
(1)(2):
(7/8) oil  (2/3) oil = 300  270 = 30
(5/24) oil = 30
(24/24) oil = 30 x (24/5) = 144
(2/3) oil = (2/3) x 144 = 96 kg
Substitute this in (2):
B + 96 = 270
B = 270  96
= 174 kg
=============================
Trust this helps.
Cheers,
Edward

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Registered: 04/21/11 Posts: 623





By: JessicaTan (offline) Tuesday, August 07 2012 @ 12:46 AM CDT



JessicaTan 

Regular Member
Registered: 10/17/09 Posts: 82



