It takes 60 days for 10 machines to dig a hole. assuming that all machines work at the same speed, how long will it take 30 machines to dig the same hole?
Answers
Answered by
8
Answer:
5 days
Step-by-step explanation:
60 = 10
30 = ?
cross multliply
30 × 10
------------
60
= 5 days for 30 machines
Answered by
11
Answer:20 minutes
Step-by-step explaination:
no. of machines total time
60 10
30 x
now we will do multiplication
6o*10=30*x
600=30x
600/30=x
20=x
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