Question

If a sprinkler waters 1 over 15 of a lawn in 1 over 3 hour, how much time will it take to water the entire lawn?

5 hours
15 hours
18 hours
45 hours

Answer 1

@Michele_Laino

Answer 2

a??

Answer 3

I'm trying...

Answer 4

please, do you know what is the entire lawn?

Answer 5

15

Answer 6

ok!

Answer 7

please note that you rate is:
\[\frac{ 1+1/15 }{ 1+1/3 }=\frac{ 16/15 }{ 4/3 }=\frac{ 16 }{ 15 }*\frac{ 3 }{ 4 }=\]
\[=\frac{ 4 }{ 5 }\]

Answer 8

so then is it a??

Answer 9

sorry, your rate is:
\[r=\frac{ 1/15 }{ 1/3 }=\frac{ 1 }{ 5 }\]
then necessary time is:
\[time=\frac{ 15 }{ 1/5 }=75\]

Answer 10

so then the answer is...

Answer 11

are you sure that entire lawn is 15?

Answer 12

I think is A., namely the first option

Answer 13

@77777jeannie77777

Answer 14

ok... thx

Answer 15

Sam measured the height of a window frame as 5.23 feet, but the actual height was 6 feet. What is the percentage of error in Sam's measurement?

6.79%
7.79%
11.23%
12.83%

Answer 16

explanation: since sprinkler uses 1/3 to water 1/15 of lawn, he have to use 15 times 1/3 in order to water th entire lawn, namely 15*(1/3)=5 hours

Answer 17

what do you think @Michele_Laino

Answer 18

oops, ...he has to use....

Answer 19

I think is the first option, namely t=5 hours

Answer 20

@Michele_Laino