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Reptile
1 month ago
12

Street sweeping vehicles can clean 3 miles of streets per hour. A city owns two street sweepers, and each sweeper can be used fo

r three hours before it comes in for an hour to refuel. During an 18-hour shift, how many miles of street can be cleaned?
Mathematics
1 answer:
AnnZ [12.3K]1 month ago
4 0
We know that
In a span of 4 hours (comprising 3 working hours and 1 hour for refueling)
each street sweeper can clean------> 3 miles*3 =9 miles

divide 18 hours by 4
18/4=4.5
4.5 equates to 4 cycles of 4 hours plus 2 hours

Multiply 4 by 9 miles
4*9=36 miles

within the 2-hour timeframe (<span>in this time, no refueling occurs)
</span>3*2=6 miles

each street sweeper can cover in 18 hours-----> (36+6)-----> 42 miles
two street sweepers will clean in 18 hours=2*42------> 84 miles

the result is
84 miles
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