Question

Given that a car can drive 92 miles with 4 gallons of gasoline, how many gallons does it need to drive 253 miles?

5 gallons


7 gallons


9 gallons


11 gallons

Answer 1

`UNITARY \: \: METHOD \\ \\ \\ We \: require \: 4 \: gallons \: to \: drive \: \\ 92 \: miles \: , \\ \\ With \: 1 \: gallon \: , \: We \: can \: drive \: (92)/(4) = 23 \: miles \\ \\ To \: drive \: 253 \: miles \: , \: \\ \\ We \: require \\ \: , \: \: \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: (253)/(23) \: \: gallons \: of \: gasoline \\ \\ \\ \: \: \: \: \: \: \: \: \: \: = \: 11 \: \: gallons \: \: \: \: \: \: \: \: \: \: \: Ans.`

Answer 2

The answer would be 9