Question

A furniture truck leaves the warehouse to deliver furniture to an apartment in the city. The people who bought the furniture want the truck to arrive at 11 a.m. If the truck travels at 30 mph it will arrive at the apartment at 10 a.m. If the truck travels at 20 mph it will arrive at the apartment at noon. How many miles is it from the furniture warehouse to the apartment in the city?

Answer 1

rate * time = distance

30 * t = 20 *(t + 2)

30 t = 20 t + 40 ... 10 t = 40 ... t = 4