peterrh peterrh
  • 03-05-2021
  • Mathematics
contestada

please show workings on how to do it :)

please show workings on how to do it class=

Respuesta :

runa16
runa16 runa16
  • 03-05-2021

Answer:

here

Step-by-step explanation:

ratio:

1x, 3x, 5x=180

9x=180

x=180/9

x=20

forgot to mention 1x=cement

3x=sand and 5x=gravel.

I only know first part of the question.

Answer Link
spaceandscience
spaceandscience spaceandscience
  • 03-05-2021

Answer:

Let the ratio be x,3x,5x

then,

or,x+3x+5x=180kg

or,9x=180

or,x=180/9

or,x=20kg

now,3x=3*20

=60kg

5x=5*20

=100 kg

therefore he doesn't have enough cement and sand but he has enough gravel.

Answer Link

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