পাতা:সূক্ষ্ম কালি কষা.pdf/১৬

iv, A SURvRYor’s HAND-BooK. 8. To convert square miles into (a) standard bighas and (b) acres. (a) Muitiply by 1936, (b) Multiply by 640. 9. To convert (a) standard bighas and (b) acres, into square miles. (a) Divide by 1936, (b) Divide by 640. 10. To convert (1) local bigha of one denomination into that of another, (2) acres into (a) local bighas and (b) vice versa and (3) square miles into (a) local bighas and (b) vice versa. (1) To convert a local bigha of one denomination into that of another. The general rule is to convert the given area into its equivalent standard area by rule 7 and then to convert this equivalent into the required local area by rule 6. Rules in the case of local bighas dealt with in this book are given below : Multiply by the figure against its denomination in the table given below and divide by the figure against the required denomination. Bigha of 5 cubits rod 100 }} } % 5% }} } ) 121 ዓ? } ) 6 92 $ 3 144 , , 6% 169 } } 33 7 33 33 196 }} 9% 7% 3 * $ 2 225 } } }} 8 93. $ ) 256 73 ?? 8% $3 27 289 3 y 3 J. 9 99 }} 324 (2) (a) First apply rule 4 and then rule 6, (b) 33 }} }} 7 3% 33 $ 2 5. (3) (a) First apply rule 8 (a) and then rule 6, (b) 2 : 77 3 * 7 $1. 99. }} 9 (α).