[204.] A jockey, on a horse galloping at the rate of 18 miles an hour on the Flemington racecourse, passes in 30 minutes over the diameter and curve of a semi-circle. What area does he enclose by the ride?
[205.] How many trees 20 feet apart cover an acre?
“Multiplication is vexation, Division is as bad. The rule of three, it puzzles me, And fractions drive me mad.”
MULTIPLY £19 19s. 11¾d. BY £19 19s. 11¾d.
This very old question is continually cropping up, and will continue to do so as long as men are able to reckon. The answer generally given is £399 19s. 2d. and a fraction, and the method of working it out as follows:—
£19 19s. 11¾d. = 19199 farthings.