A company has two types of machines, type r and type s. Operating at a constant rate, a machine of type r does a certain job in 36 hours and a machine of type s does the same job in 18 hours. If the company used the same number of each type of machine to do the job in 2 hours, how many machines of type r were used
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Answer:
Step-by-step explanation:
Take total work as 360
R:
work : 360
time: 36hrs
rate: 10(calculaed)
S:
Work:360
time 18hrs
rate: 20( calculated)
together
given work:360
time2 hrs
calculated: 180
rate: 180/(10+20) = 180/30 = 6 each
wwwyashkirdak1:
Is it right ?
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