The Student Room Group
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>

maths question?? cant work out the concept

Sam and two friends put letters in envelopes on Monday. The three of them take two hours to put 600 letters in envelopes.
(a) On Tuesday Sam has three friends helping.
Working at the same rate, how many letters should the four of them be able to put in envelopes in two hours?

(b) Working at the same rate, how much longer would it take four people to put 1000 letters in envelopes than it would take five people?

(c) Sam says
It took two hours for three people to put 600 letters in envelopes. If I assume they work all day, then in one day three people will put 7200 letters in envelopes because 600 × 12 = 7200.
Why is Sam’s assumption not reasonable? What effect has Sam’s assumption had on her answer?



honestly do not get these, really cannot wrap my head around it so if someone could go over the steps in detail it would be much appreciated
Reply 1
Avatar for phys981
phys981
10
You have to break it down

Sam and two friends put letters in envelopes on Monday. The three of them take two hours to put 600 letters in envelopes.

Ask yourself - how many did each person do in these two hours?

(a) Now how many people are there? Assuming each person still does the same number in two hours, what will the total be?

Does that help to get you started?

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you