The problem consists of two parts. The first part asks: Liam hires a bike and has to return it by 3 pm. The current time is 2:25 pm. How many minutes does Liam have left? The second part asks: Amy hires a bike for 45 minutes. She takes the bike out at 3:30 pm. At what time must she return the bike?

1. Problem Description

The problem consists of two parts.

The first part asks: Liam hires a bike and has to return it by 3 pm. The current time is 2:25 pm. How many minutes does Liam have left?

The second part asks: Amy hires a bike for 45 minutes. She takes the bike out at 3:30 pm. At what time must she return the bike?

2. Solution Steps

Part 1:

Liam has to return the bike by 3:00 pm. The current time is 2:25 pm.

We need to find the difference between 3:00 pm and 2:25 pm in minutes.

From 2:25 pm to 3:00 pm, there are 35 minutes.

$60 - 25 = 35$

Therefore, Liam has 35 minutes left.

Part 2:

Amy takes the bike out at 3:30 pm and hires it for 45 minutes.

We need to find the time when she must return the bike.

We add 45 minutes to 3:30 pm.

$3:30 + 45 \text{ minutes} = 3:30 + 30 \text{ minutes} + 15 \text{ minutes} = 4:00 + 15 \text{ minutes} = 4:15 \text{ pm}$

Alternatively:

$30+45 = 75$ minutes. 75 minutes is 1 hour and 15 minutes.

$3:30 + 1 \text{ hour} 15 \text{ minutes} = 4:45$.

$3:30 + 0:45 = 4:15$

Amy must return the bike at 4:15 pm.

3. Final Answer

Part 1: 35 minutes

Part 2: 4:15 pm