Find the total of 42, 75, 189, 301, and 728

When we are asked to find the total of something, you just add them up. An easy way to do this is to place them in rows (with 0 as a placeholder so that the units, tens and hundred all line up), then add up each line.

042
075
189
301
728

1335

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

ans789

step-by-step explanation: