Question

A machine can seal 10 envelopes in 3.2 s. If the machine works at the same rate, how long will it take to seal 120 envelopes?

Answer 1

any ideas?

Answer 2

recall

work rate X time = work done

Answer 3

so divide 10 and 2.3?

Answer 4

hello

Answer 5

3.2 seconds not 2.3

Answer 6

10/3.2 = work rate

Answer 7

Now use the formula above and solve for time.

Answer 8

work rate X time = work done

10/3.2 X time = 120

Answer 9

time(seconds) = [120(3.2)]/10

Answer 10

hello