The Kiljaro Highway is marked with Milestones denoting the distance to the town of Kiljaro. Tommy left kiljaro and drove the highway, passing the 10 km milestone at 8:30. Some time afterwards, Tommy got a phone call asking him to return home, and he made a U-turn at the 160 km milestone. At 09:A0 Tommy passed the milestone marking 70 km to Kiljaro. The variable A represents the tens digit of the minutes in 09:A0. Assuming Tommy maintained the same constant speed during the entire drive, how many kilometers did Tommy travel in one minute?
P.S: Bunuel/VeritasPrepKarishma- can you please provide an explanation and how to approach this type of questions in least possible time? It took around 4 minutes to understand and solve!
So he travelled first 150 km from 10 to 160km
Then he travelled 90 km more for a total of 240 km
So average time in km per minute will be expressed as
240 / (30 + 10A)
Allow me to explain. 30 minutes 'till 9am. And then 10A is cause the A is in the tens digit
So A is the correct answer
Hope it helps!