A mason mixes 42 kilograms of mortar. Each kilogram of mortar mix requires 0.03 liters of water. Rounded to the nearest tenth, how many liters of water are required?
Select one:
a. 1.2 liters
b. 1.3 liters
c. 12.6 liters
d. 13.2 liters
Answer (2)
1.3 liters
Explanation
Understanding the Problem We are given that a mason mixes 42 kilograms of mortar and that each kilogram of mortar mix requires 0.03 liters of water. We need to find the total amount of water required, rounded to the nearest tenth of a liter.
Calculating Total Water Required To find the total amount of water required, we multiply the number of kilograms of mortar mix by the amount of water required per kilogram: 42 kilograms × 0.03 kilogram liters = 1.26 liters
Rounding to the Nearest Tenth Now, we round the result to the nearest tenth of a liter. Since the hundredths digit is 6, which is greater than or equal to 5, we round up the tenths digit: 1.26 liters ≈ 1.3 liters
Final Answer Therefore, the total amount of water required is approximately 1.3 liters.
Examples
When preparing concrete, it's crucial to calculate the correct amount of water to add to the cement mix. If you're mixing 50 kg of cement and each kg requires 0.04 liters of water, you'll need to calculate 50 * 0.04 = 2 liters of water. This ensures the concrete sets properly and achieves the desired strength. Accurate calculations prevent the concrete from being too watery (weak) or too dry (unworkable).
To find the total liters of water required for 42 kilograms of mortar, we multiply the kilograms by the water requirement per kilogram, resulting in 1.26 liters. Rounded to the nearest tenth, this is approximately 1.3 liters. Therefore, the answer is 1.3 liters.
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