If a sprinkler waters 1 over 14 of a lawn in 1 over 2 hour, how much time will it take to water the entire lawn?

1 over 7 hour
4 over 7 hour
4 hours
7 hours

Question

If a sprinkler waters 1 over 14 of a lawn in 1 over 2 hour, how much time will it take to water the entire lawn?

 1 over 7 hour
 4 over 7 hour
 4 hours
 7 hours

jenessa_2413 · Answer

@phi

phi · Answer

I would rate * time = amount

in this case, rate is  amount of a lawn per hour

I would write down the fraction amount sprinkled divided by the time it took

can you do that ?

phi · Answer

you could also "puzzle it out", but that takes more time.

jenessa_2413 · Answer

sorry i took so long...i got 1/28 @phi

junhaoz · Answer

@jenessa_2413 to get the rate you should divide 1/14 over 1/2, not multiply

jenessa_2413 · Answer

oh ok thanks

junhaoz · Answer

You get the rate is 1/7 of the lawn every hour. therefore how many hours, or 1/7 of a lawn, makes up 1 lawn?

jenessa_2413 · Answer

i got 4/7

junhaoz · Answer

Dividing 1/14 by 1/2? that's the same as multiplying by 2, so 2/14 is 1/7.

jenessa_2413 · Answer

ok

jenessa_2413 · Answer

so its 1/7

junhaoz · Answer

yeah. And how many 1/7 is 1?

robtobey2 · Answer

lawn_area per time
Refer to the attachment.