Word problems

[shellybear10]

i have 3 word problems i am stuck on

1: A new car has a fuel economy rating of 5.5 L/ 100 km. How many litres of gas would it take this car to go 675 km? Full solution plz thanks

2: One Canadian dollor will buy 54.8973 indian rupees. How much would it cost (rounded to the nearest penny) to buy 1000 INR? Full solution plz thanks:smile:

3: If it takes Mr.Winward two and a half hours to mark 14 math tests, how long does it take him to mark each one? Full solution plz thanks:smile:
If u could reply back ASAP that would be great need it for tommorow thanks

 

[stapel]

1: A new car has a fuel economy rating of 5.5 L/ 100 km. How many litres of gas would it take this car to go 675 km?

How many "100 km" fit into "675 km"? (Hint: Divide.) So how many "5.5 L" do you need? (Hint: It's the same as the answer to the last question.) S how many litres do you need? (Hint: Multiply.)

2: One Canadian dollor will buy 54.8973 indian rupees. How much would it cost (rounded to the nearest penny) to buy 1000 INR?

Set things up so the units cancel: (54.8973 INR / C$1)*(C$x / 1000 INR). Simplify to get the answer.

3: If it takes Mr.Winward two and a half hours to mark 14 math tests, how long does it take him to mark each one?

Hint: Convert to minutes; then divide.

Full solution plz thanks

Um... that's kinda your job, ya know? :wink:

 

[HallsofIvy]

i have 3 word problems i am stuck on

1: A new car has a fuel economy rating of 5.5 L/ 100 km. How many litres of gas would it take this car to go 675 km? Full solution plz thanks

You have \(\displaystyle \dfrac{5.5}{100} \dfrac{L}{km}\), are given "km" and want "L". You know that \(\displaystyle \left(\dfrac{L}{km}\right)(km)= L\), don't you? So multiply.

2: One Canadian dollor will buy 54.8973 indian rupees. How much would it cost (rounded to the nearest penny) to buy 1000 INR? Full solution plz thanks:smile:

You have \(\displaystyle \dfrac{1}{54.8973}\dfrac{Cd}{INR}\), are given "INR" and want "Cd". You know that \(\displaystyle \left(\dfrac}{Cd}{INR}\right)(INR)= Cd\), don't you?

3: If it takes Mr.Winward two and a half hours to mark 14 math tests, how long does it take him to mark each one? Full solution plz thanks:smile:

You have \(\displaystyle \dfrac{2.4}{14} \dfrac{hours}{test}\), are given "tests" and want "hours". You know that \(\displaystyle \left(\dfrac{hours}{tests}\right)(test)= hours\), don't you?

If u could reply back ASAP that would be great need it for tommorow thanks

So you can trick your teacher into thinking you already know this and not give you any more instruction in it? How do you plan to pass the tests?