Tom’s Rate + Sam’s rate = Together rate
Therefore, Sam’s rate = Together rate – Tom’s rate
Sam's rate = 1/x job per hour
Together rate = 1/2 job per hour
Tom's rate = 1/7 job per hour
Therefore,
1/x = 1/2 – 1/7
(multiply the equation by 14x; 14x is the lowest common multiple of the denominators)
14 = 7x – 2x
5x = 14
x = 2.8 hours
2.8 hours = 2 hours + (0.8 X 60) minutes
0.8 X 60 = 48 minute
Therefore, 2.8 hours = 2hrs 48 mins
How long it would take Sam to finish the same job alone is 2hrs 48 mins.
According to above equation, Sam will take 2hrs and 48 mins to finish the same job alone.
Plowing refers to as a job in which a man plow the land pulled by horses. In simple words we can say that under plowing jobs farmers cuts the soil into parts in order to do planting.
Solution:
Sam’s rate = Together rate – Tom’s rate
Sam's rate = 1/x job per hour
Together rate = 1/2 job per hour
Tom's rate = 1/7 job per hour
Therefore,
1/x = 1/2 – 1/7
multiply the equation by 14x,
14 = 7x – 2x
5x = 14
x = 2.8 hours
2.8 hours = 2 hours + (0.8 X 60) minutes
0.8 X 60 = 48 minute
Therefore, 2.8 hours = 2hrs 48 mins
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