A barge filled high with sand approaches a low bridge over the river and cannot quite pass under it.?

Question

A barge filled high with sand approaches a low bridge over the river and cannot quite pass under it. Should sand be added to, or removed from, the barge? (13-10)

please help, thanks!

Answer 1

Add more sand of course - the added weight will cause the barge to sit lower in the water. - and when lower could slip under the bridge.

If you take sand out - the barge will be lighter and so sit higher in the water this make the barge top closer again to the bridge and less likely to slide under.


Of course ADD more sand!

Answer 2

remove all the sand and wait for low tide.

Answer 3

wait for the tide to go out, then go under