Answer: I'm on the iReady question right now so I'll do it for you! The boxes length is 4, the height is 5 and the width is 3. So the answer is 60 Cubic Meters.
(Heres my explanation): The reason the answer is 60 Cubic Meters is because whenever you do these you have to do WxLxH = Width x Length x Height or Width times Length times Height or however you say it!
So we have 4 as the length so we now have 4 x ?
Now you get 5 as the height which is going to give us 4 x 5 x ?
Then we got 3 as the width so now we have 4 x 5 x 3!
Now lets do 4 x 5 x 3.
4 x 5 is 20 x 3 = 60
or you can do 4 x 5 x 3 at the same time. I prefer getting the biggest number so 5 x 4 which is 20 times 3 or you can do 3 x 4 but it gives you a even number that doesn't have a 0 behind it. So i prefer 20. Now we do 20 x 3 = 60!
There wasn't much to this but I'm happy to help you better understand.
Have a good day! <3
(Don't forget to add Cubic Meters)