Question

A printer printed 68 letters in 4 seconds. If it prints letters at a constant speed, it can print ______ letters in 30 seconds.

Answer 1

A printer printed 68 letters in 4 seconds
How many letters can it print in 1 second?

Answer 2

well it can print in 1 second that would be im not sure actually

Answer 3

Think of it like an equation
68 letters = 4 seconds

We can divide both sides by 4 to get
68/4 letters = 4/4 seconds
17 letters = 1 second

This tells us the speed of the printer is 17 letters per second. Agreed?

Answer 4

yea it seems like a answer to role with agreed

Answer 5

So from here we multiply both sides by 30 to change the "1 second" into "30 seconds"

17 letters = 1 second
30*17 letters = 30*1 second
510 letters = 30 seconds

The printer can print 510 letters in 30 seconds

Answer 6

oh ok thanks dude big help i've been stuck on this question for about two hours

Answer 7

If you're curious, here's another way to do the problem

(number of letters)/(number of seconds) = (number of letters)/(number of seconds)
(68 letters)/(4 seconds) = (x letters)/(30 seconds)
68/4 = x/30
68*30 = 4x ... cross multiply
2040 = 4x
4x = 2040
x = 2040/4 .... divide both sides by 4
x = 510

We get the same answer as before