SOLUTION: question: if 3 1/2 tons of coals cost $21.75. what will be the bill of 7 1/2 tons of coals? can anyone provide me the solution for this problem? thank you..

Question 490191: question:
if 3 1/2 tons of coals cost $21.75. what will be the bill of 7 1/2 tons of coals? can anyone provide me the solution for this problem? thank you..
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
3 and 1/2 tons of coal costs $21.75
Twice as much coal would cost twice as much, so
7 tons of coal costs $43.50
Each ton of coal costs $43.50 / 7 = $6.22
A half-ton of coal would then cost $3.11
7 and 1/2 tons then costs $43.50 + $3.11 = $46.61
(each step rounded to nearest cent)
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