Question

Show an equation for the problem. At the coal mine, it takes the older conveyor belt 20 hours to move one day's coal output. The new belt can do it in 15 hours. If the old belt began to move the day's output and the new belt started as well an hour later, how long would it take to move it? Round to the nearest tenth.
\[A. \frac{ 10 }{ x }+\frac{ x-1 }{ 20 }=1\]
\[B. \frac{ 10 }{ x }+\frac{ 20 }{ x-1 }=1\]
\[C. \frac{ x }{ 20 }+\frac{ x-1 }{ 15}=1\]
\[D. \frac{ x }{ 15}+\frac{ x-1 }{ 20}=1\]

Answer 1

@hartnn

Answer 2

@jim_thompson5910

Answer 3

i believe it would be C

Answer 4

it is C

Answer 5

yes.