Question

De una madeja de lana hemos usado 13/18 partes para hacer una jersey. Al terminar, aún nos sobran 10 metros de lana. ¿Qué longitud tenía inicialmente la madeja?

Answer 1

Given :  De una madeja de lana hemos usado 13/18 partes para hacer una jersey. Al terminar, aún nos sobran 10 metros de lana

To find :  Qué longitud tenía inicialmente la madeja?

Solution:

From a skein of wool we have used 13/18 parts to make a sweater. When finished, we still have 10 meters of wool left. How long was the skein initially

Let say  wool  Was  =  18W   m

Digamos que la lana era =  18W   m

Used  = (13/18)(18W)  = 13W   m

Usado =  (13/18)(18W)  = 13W   m

Wool Remaining  = 18W - 13W  = 5W   m

Lana restante = 18W - 13W  = 5W   m

5W  =  10

=> W  = 2

=> 18W = 36

skein initially was 36 m  long  

madeja inicialmente tenía 36 m de largo

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