Answer:
30%
Step-by-step explanation:
To find a percentage of a number, take the part of the number and divide it by the whole, then multiply by 100%.
In this case:
6 / 20 = 0.3
0.3 * 100% = 30%
The answer for this is the rules is x n y
Divide total bags by total hours:
30 bags / 3 hours = 10 bags per hour
Hence first mechanic worked for 15 hours and second mechanic worked for 5 hours.
<h3>What is ratio and proportion?</h3>
When comparing two quantities of the same kind, ratio is utilized.
For two numbers, a and b, the ratio formula is written as a: b or a/b.
Two or more ratios are said to be in proportion if they are all equal.
Fractions are the foundation of the concepts of ratio and proportion.
Let x is the number of hours the first mechanic worked and y is the number of hours the second mechanic worked.
∵x+y = 20
x = 20 - y
115x+100y = 2225
115(20-y) + 100y = 2225
2300 - 115y +100y = 2225
15y = 75
y = 5 hours
∴ x = 20-5
x = 15 hours
To know more about ratio and proportion please visit:
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C=2pir=pid
given
c=28pi
28pi=2pir=pid
divide everybody by pi
28=2r=d
28=d
28=2r
divide 2
14=r
d=28 m
first option
r=14 m