[ Motion problems ] [ Arithmetic. Mental calculation, etc. ]

If Anya walks to school and takes the bus back, she spends a total of 1.5 hours on the road. If she takes the bus both ways, the entire journey takes her 30 minutes. How much time will Anya spend on the road if she walks to and from school?
The round trip on foot plus the round trip by bus takes as much time as two trips on foot and one trip by bus.

## Solution

$2 \cdot 1.5 - 0.5 = 2.5$ hours.

## Answer

2.5 hours.