370
One curved surface (that goes round the cylinder) and 2 flat ends
a cylinder has 3 faces (the 2 at each end and the one that goes all the way round) and 2 edges - were the 2 ends connect to the large face.
There are no ends to a circle. A chord connects 2 ends of an arc though.
You would round it down to... 2
It means you should take your answer and round it up or down to the nearest multiple of ten. and number that ends in 1,2,3,4 you round down and any number ending in 5,6,7,8,9 you round up. for instance . . . 13 ends in a 3 and would round down to 10. 18 ends in an 8 and would round up to 20. 775 ends in a 5 and would round up to 780. 1282 ends in a 2 and would round down to 1280. Hope that helps.
370
It ends in 2, so it rounds down to 80.
It ends in 2, so it is rounded down to 755,080.
It ends in 2, so it is rounded down to 820.
It ends with a 2, so it must be rounded down to 840.
There are 2 towers. The segment in the middle is on a rail on the towers. Ropes goes from the ends of the middle segment up to a pulleys on the towers and from there to motors at the ends of the bridge. When the motors run the pull the middle segment up.
As the figure ends in 9, it rounds up to give 0.60 as the answer.
It ends in a 2, so it is rounded down to 2790.
As the thousands part ends in 2, it rounds down to 40,000.
One curved surface (that goes round the cylinder) and 2 flat ends
List the numbers from least to greatest. Count in from both ends the same times and you will note there is no middle number, but 2 middle numbers. Take the average of the 2 middle numbers and that is the mean of the set.