Question

Un camión recorre $\dfrac{b}{6}$ pies cada $t$ segundos. Hay $3$ pies en una yarda. ¿Cuántas yardas recorre el camión en $3$ minutos?

A truck travels $\dfrac{b}{6}$ feet every $t$ seconds. There are $3$ feet in a yard. How many yards does the truck travel in $3$ minutes?

$\dfrac{b}{1080t}$

$\dfrac{30t}{b}$

$\dfrac{30b}{t}$

$\dfrac{10t}{b}$

$\dfrac{10b}{t}$

Solución:

Esto significa que recorre $\dfrac{b}{18}$ yardas en $t$ segundos, ya que una yarda equivale a $3$ pies. Entonces, en un segundo recorre $\dfrac{b}{18t}$ yardas.

Por lo tanto, en $3$ minutos, que son $180$ segundos, recorre $\dfrac{b}{18t}\cdot 180 = \dfrac {10b}t.$

Así, la respuesta correcta es E.

This means it travels $\dfrac{b}{18}$ yards in $t$ seconds since a yard is $3$ feet. Then, in one second, it travels $\dfrac{b}{18t}$ yards.

Therefore, in $3$ minutes which is $180$ seconds, it travels $\dfrac{b}{18t}\cdot 180 = \dfrac {10b}t.$

Thus, the correct answer is E .

2014 AMC 10B Problema 8

Solución:

El Problema 8 en otros años