John can can do a job in 2 hours. His friend, Ben, can can do the same job in 6 hours. How long would it take for two of them to do the job together? PLS HELP WITH EXPLANATION FAST, 20 POINTS

1.5 hours

Step-by-step explanation:

Let the work be represented by x for simplification

For john

amount of work done in 2 hours = x

amount of work done by John  1 hours = x/2

For Ben

amount of work done in 6 hours = x

amount of work done by Ben in  1 hours = x/6

when John and Ben works together

amount of work by both of them in 1 hour = amount of work done by John  1 hours  + amount of work done by Ben in  1 hours

amount of work by both of them in 1 hour = x/2 + x/6

taking 6 as LCM of 2 and 6

amount of work by both of them in 1 hour = (3x+x)/6 = 4x/6 = 2x/3

Thus,

2x/3  work is done by both of them together in time =  1 hour

to find time taken to do total work which is represented by x

we divide both side by 2/3

2x/3 work is done by both of them together in time =  1 hour

2x/3/(2/3) work is done by both of them together in time =  1/(2/3) hour

on LHS 2/3 in numerator and denominator gets cancelled

on RHS  1/(2/3) = 3/2

x work is done by both of them together in time =  3/2 hours = 1.5 hours

Thus, it will take 1.5 hours for two of them to do the job together.

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.

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step-by-step explanation: