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CHAPTER V-RULE-OP-THREE.
An example on inverse quadruple rule-of-three. 22. There is a block of stone (suited for building purposes which measures 6 hastas in breadth, 30 hastas in length and 8 hastas in height, and (it is) 9 in worth. By means of this (given in exchange), how many (blocks) of such stone, fit to be used in building a Jina templo, (may be obtained, each) moasuring 2 by 8 by 1 (hastas), and being 5 in worth?
Thus ends the invorso double, treble and quadruplo rule-ofthree.
Tho rule in regard to (problems bearing on uspooiatel) forward and backward movement.
23. Write down the net daily movement, as derived from the difforence of the given rates of) forward and backward movemouts, each (of these rates) being (first) divided by its own (epooified) time; and then in relation to this (net daily movement), carry out the operation of the rule-of-three.
Examples in illustration thereof. 24-25. In the courso of of a day, a whip goch over of a krosa in the ocean; being upposed by the wind who goes back (during the same time) é of a krosul. Give ont, U you who havo powerful arms in crossing over the ocean of numbers woll, in what time that (ship) will have gone over 993 yojanux.
26. A man omrning (at the rate of) 11 of it gold coin in 31 daye, spends in 41 days of the golil coin is also of that (1) itsolf; by what time will be own 70 (of those gold coins as his net earnings)?
27. That excellent elephant, wbieb, with temples that are attacked by the feet of bees greedy of the flowing) ichor, goes over as well as of a yojana in 5 days, and moves back in 31 days over of a kronut : say in wbat time he will have gone over (a net distance of) 100 yojumax lens by į kro a.
28-30. A well completely filled with wntor in 10 dumtur in depth ; a lotus sptting up therein grows from the bottom
28-30. The 'dopth' of the will is mentioned in the original u 'height' · mrvured from the bottom of it.
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