Answer:
Yes, she can drive round trip on free gas
Explanation:
She gets MPG (miles Per Gallon) of 35
She got 100 gallons of gas for free
So, she has around:
35 * 100 = 3500 miles to travel on that free gas
Now, her cousin lives 1650 miles away. If she were to take a round trip (go and come back), she would need to travel a total of:
1650 + 1650 = 3300 miles
Her free gas would take her 3500 miles and her round trip is 3300 miles, so YES, definitely she will be able to drive up and down with free gas.