Answer: it will take them 28 minutes to fill the tank.
Step-by-step explanation:
The first pipe alone can fill the tank in 84 minutes. This means that the rate at which the first pipe fills the tank per minute is 1/84
The second pipe can fill the tank in 42 minutes by itself. This means that the rate at which the second pipe fills the tank per minute is 1/42
If they work together, they would work simultaneously and their individual rates are additive. This means that their combined rate of filling the tank would be
1/84 + 1/42
Assuming it takes t hours for both pipes to fill the tank working together, the working rate per minute would be 1/t. Therefore,
1/84 + 1/42 = 1/t
3/84 = 1/t
t = 84/3
t = 28 minutes
Answer:
i think is 26 i may be wrong tho
X is twenty
2x+6x+20=180
8x=160
X=20
Answer:
D=6
Step-by-step explanation:
'D' being 'Maximum amount of days in which Sandra can rent the car' must be equal to 6, as 10*6=60, which is the remainder of Sandra's budget after the 30 dollar fixed fee she must pay.
