## Civil Engineering problems

### Question #1:

You’re a construction engineer and one of your responsibilities is
to estimate and schedule construction workers to complete projects. You’ve
been given the job to frame a house and you know that 30 men can complete
the job in 12 days if the number of working hours per day is 8.

However, you only have a construction crew of 24 workers and your contract
requires that you complete the framing in 10 days. If the job is to be completed
in 10 days with 24 workers, what will be the working hours per day?

### Question #2:

You are a civil engineer who is responsible for building a new road. As
a part of the road-building project, you must construct a concrete intersection
where the new road will cross an existing road. Concrete can be made by
mixing cement, sand, and gravel in the ratio 3:6:8. How much gravel is needed
to make 850 cubic meters of concrete?

## Chemical Engineering problem

### Question #3:

An alloy of copper and silver containing 60% pure silver is mixed
with another alloy, also of copper and silver containing 65% pure silver.
How much of each type is needed to produce 1.2 kg of alloy containing 62%
pure silver?