contestada

To make concrete, Rita dumped two bags of gravel each weighing 3 3/4 kg into a wheelbarrow. Then she added a 1 7/8 kg bag of cement. What percent of the weight of the mixture is the weight of the gravel?

Respuesta :

AlbertThomas

[tex] \frac{2 \times 3 \frac{3}{4} }{2 \times 3 \frac{3}{4} + 1 \frac{7}{8} } = \frac{2 \times \frac{15}{4} }{2 \times \frac{15}{4} + \frac{15}{8} } = \frac{ \frac{30}{4} }{ \frac{30}{4} + \frac{15}{8} } [/tex]
=
[tex] \frac{ \frac{60}{8} }{ \frac{60}{8} + \frac{15}{8} } = \frac{ \frac{60}{8} }{ \frac{75}{8} } = \frac{4}{5} = .80 [/tex]
= 80%

Otras preguntas