AndreaMoreno6 AndreaMoreno6
  • 11-01-2022
  • Mathematics
contestada

Zahir completes 1/5 of his homework in 5/15 of an hour. How much time will
it take him to complete all of his homework?

Respuesta :

clarch19
clarch19 clarch19
  • 11-01-2022

Answer:

t = 100 minutes, or 1 hr, 40 minutes

Step-by-step explanation:

5/15 of 1 hour is the same as 5/15 of 60 minutes, which is 20 minutes

you can set up a proportion of hw completed / minutes = hw completed / min:

(1/5 ÷ 20) = (1 ÷ t)    we use '1' to indicate all homework (or 100% of hw) and 't' to indicate time required

cross-multiply to get:

20 = 5/t

t = 100 minutes, or 1 hr, 40 minutes

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