If it takes 42 minutes to load
We know that it takes 42m to load
We want to find out how long it takes to load
Too bad it was not the time wanted to load 7 trucks, because:
2(42m)=84m for 7 trucks.
The reason we should bother with this answer is because:
Now we have an estimate for the real answer we will need to find (must be slightly less than 84m).
We could find the time it takes to load 1 truck by dividing the time (42m) by
Then we could multiply the time to load 1 truck by
And that is in line with our estimate of 84m calculated previously.
The more trucks, the more minutes.
Given that 42 minutes are required to load
Let ‘x minutes’ be the time to load
By cross multiplication
Thus x=78 minutes
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