Part A
The ratio of cement:sand:water is 1:3:6
This means we have 1 part cement, 3 parts sand, 6 parts water. These are the basic building blocks to form concrete and the smaller pieces must be in this ratio.
Focus on the first two values 1:3 since we're only worried about cement and sand for part A. We ignore the water element.
We have 4 bags of cement and x bags of sand that are in ratio 1:3
4:x = 1:3
4/x = 1/3
4*3 = x*1
12 = x
x = 12
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Part B
This time we'll ignore the cement aspect. We only focus on the sand and water.
3:6 is the ratio of sand to water in that order.
x = number of buckets of water.
10 bags of sand to x buckets of water = 3:6
10:x = 3:6
10/x = 3/6
10*6 = x*3
60 = 3x
3x = 60
x = 60/3
x = 20
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Part C
Like with part B, we'll ignore the cement.
x = number of bags of sand
x bags of sand to 25 buckets of water = 3:6
x:25 = 3/6
x/25 = 3/6
6x = 25*3
6x = 75
x = 75/6
x = 12.5
Answer:
A) 12 bags of sand are needed
Step-by-step explanation:
A) Your question is not complete because you didn’t mention the concrete volume. Let's assume you want to know the number of bags of cement required for 100 cft concrete considering 1:3:6 mix ratio. Lets begin!
Total volume of concrete= 100 cft
Mix Ratio= 1:3:6
Dry Volume of concrete= 1.5* Wet volume= 1.5*100cft= 150cft
Hence, Volume of cement required = 150*1/(1+3+6)= 15 cft
And, we know that one bag of cement contain 50kg or 1.25 cft Cement
Bags of Cement required = 15/1.25 = 12 Bags
