Verified Answer :

Ok, so here we need to set up a proportion.

205 = 100

So in a minute, the 5 people have 100 chairs stacked.

1/100 = x/250

Cross multiply

1250 = 100x
250 = 100x
250/100 = x
x = 2.5

So it would take 5 people 2.5 minutes to stack 250 chairs. 

Final answer: 2.5 minutes

AL2006
  • Each person stacks 20 in one minute.

    - 5 people can stack 100 in 5 minutes.
    If so, how long would 250 take them ?

    -- The same 5 people can stack 250 in (250/100)= 2.5 minutes.

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