An oil company fills 1 over 10 of a tank in 1 over 5 hour. At this rate, which expression can be used to determine how long will it take for the tank to fill completely?

Question

horsegal244 · Answer

@misty1212 @mathstudent55  @brunomcv

anonymous · Answer

1 over 10 (1/10) will be 0.1 which is 10%
1 over 5 (1/5) will be 0.5 which is 50%

10% in a 50% hour, it fills the tank 10% in 30 minutes.
To get 100% multiply by 10, so in 300 Minutes it fills the tank.

300 minutes is 5 hours.

anonymous · Answer

You got it?

horsegal244 · Answer

so 300 is the answer?

anonymous · Answer

In minutes, yes, in hours it's 5
To look more simple just answer 5 hours.

horsegal244 · Answer

these are the answers

horsegal244 · Answer

@brunomcv?

anonymous · Answer

Hold on, let me review this

anonymous · Answer

There's the error, 1 over 5 hours is 20% of an hour, my bad.

horsegal244 · Answer

k

anonymous · Answer

1 over 10 (1/10) will be 0.1 which is 10%
1 over 5 (1/5) will be 0.2 which is 20%

10% in a 20% hour, it fills the tank 10% in 12 minutes.
To get 100% multiply by 10, so in 120 Minutes it fills the tank.

120 minutes or 2 hours.
According to ur available answers, it's the first one, (1/5)(10)

horsegal244 · Answer

ok i have 1 more i need help with..

anonymous · Answer

ok

mathstudent55 · Answer

The rate is 1/10 of a tank in 1/5 hour.

$\dfrac{\frac{1}{10} ~tank}{\frac{1}{5} hour} $

We want a full tank, so we need to multiply the numerator by 10 to have 1 tank.

$=\dfrac{\frac{1}{10} ~tank}{\frac{1}{5} hour} \times \dfrac{10}{10} $

$=\dfrac{\frac{1}{10} \times 10~tank}{\frac{1}{5} \times 10~hour}$ 

$= \dfrac{1~tank}{2~hours} $