Question Video: Using Earlier and Later to Compare Times on Analog Clocks | Nagwa Question Video: Using Earlier and Later to Compare Times on Analog Clocks | Nagwa

# Question Video: Using Earlier and Later to Compare Times on Analog Clocks Mathematics

Matthew and Chloe both started their work at the same time. Who finished later?

02:15

### Video Transcript

Matthew and Chloe both started their work at the same time. Who finished later?

Underneath the question, we can see a picture of Matthew and Chloe. And both speech bubbles tell us the times that they finish their work. Let’s look at them one by one. If we look at the minute hand, which is the long hand on Matthew’s clock, we can see that it’s pointing straight down to the number six. We know that when a minute hand points straight up, it’s an o’clock time. And if it’s turned to point to the number six, we know that it’s made half a turn around the clock. The time must be half past something, but half past what? Let’s look at the hour hand to find out.

The hour hand on Matthew’s clock, which is the shorter hand, isn’t pointing at any numbers. In fact, it’s halfway in between the four and the five. Do you think that means it’s half past four or half past five? Well, if we think of the direction that hands move on a clock, we know that it’s gone past the four, but it hasn’t quite reached the number five yet. The time is half past four. Now, let’s see what time Chloe finished her work.

The minute hand on Chloe’s clock is pointing to the 12. This is an o’clock time. And if we look at the hour hand, it’s pointing to the four. Chloe finished her work at four o’clock. Now, our question asks us, who finished later? Which time comes after the other, half past four or four o’clock? Well, as we’ve said already, four o’clock comes first. And the dotted line that we drew on Matthew’s clock shows us that half past four comes when the minute hand has gone half the way around the clock. Matthew finished working after Chloe. Matthew finished later.

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