“Johnny,” said his teacher, “if your father can do a piece of work in
seven days, and your uncle George can do it in nine days, how long
would it take both of them to do it?”
“They’d never get it done,” said Johnny; “they’d sit down and tell
snake-yarns.”
110. A well is to be sunk by 12 men, in groups of 4 each, in 12 days.
The groups work in the ratio of 6, 7, and 8; when half the task is
done rain sets in and prevents them working for 2 days, in which time
one man of the first, 2 of the second, and 3 of the third group go
away, leaving the remainder to finish the job. What extra time did
they work?
“TAKE CARE OF THE PENCE, &c.”