Question

Shaun and Kendra want to scan old family photos into a computer photo organizing

program. On his laptop Shaun can scan about five photos in three minutes. Kendra can
scan about eight photos in five minutes on her computer. Working together, how many
minutes (t) would it take for both of them to scan 36 photos?
Please help.

Answer 1

Approximately 11 minutes

Explanation:

Let t be the time in minutes working together.

Shaun: 5/3 photos per minute

Kendra: 8/5 photos per minute

Combined: 36/t photos per minute

5/3 + 8/5 = 36/t

15t(5/3 + 8/5) = 15t(36/t)

25t + 24t = 540

49t = 540

t = 540/49 = 11.02

Answer: Approximately 11 minutes