Five containers have an average mass of 42 kilograms. Four containers together weigh 158 kilograms. How many kilograms does the fifth container weigh?
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- Use the average mass to find the mass of all five containers.
- Calculate 42 × 5 − 158.
Show the answer and solution
Answer: 52
The total mass of the five containers is 42 × 5 = 210 kilograms. The fifth weighs 210 − 158 = 52 kilograms.