At noon, the shadow of a flagpole is 10 feet long. At the same time, the shadow of a 140-foot tall building is 60 feet long. Wha
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Well, their speeds are (
is Jack's speed, and 
is Richard's.
They, together, can paint 12 houses in 35 days. To get a single house, we only have to calculate
which is very close to 3 (a bit below)
They, together, can paint 12 houses in 35 days. To get a single house, we only have to calculate