I think it should be 31.5
6 builders over 21 days would be equal to 9 builders over X days. Then you would cross multiply
25 people can dig the hole of 50 m deep in hours
Explanation
4 people can dig a hole 20 m deep in 3 hours
So, 1 people can dig a hole 20 m deep in (3×4)hours= 12 hours [If the number of people decreases, then the time taken to dig the hole will increase]
and 1 people can dig a hole 1 m deep in ()hours = hours = 0.6 hours
Now, if 1 people dig the hole of 50 m , then the time needed = (0.6×50) hours = 30 hours
So, 25 people can dig the hole of 50 m deep in = hours
Answer:
n=0
Step-by-step explanation:
Rearrange
10+2=8−2+10
2+10=8−2+10
Combine like terms
2n+10=<u>8n−2n</u>+10
2+10=<u>6</u>+10
Subtract from both sides
2+10=6+10
2+10<u>−10=</u>6+10<u>−10</u>
Simplify
2n=6n
Subtract both sides from 6n of the equation
2=6
2<u>−6</u>=6<u>−6</u>
Solution
n=0
(1 + 9i + 5 - 3i)/2 = (6 + 6i)/2 = 3 + 3i