Question

se 3 tratores aram 500 metros em 20 minutos em quanto tempo 6 tratores ararao 1000 metros nas mesmas condições?

Answer 1

$tratores \: \: \: \: \: \: \: \: metros \: \: \: \: \: \: minutos \\ 3 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 500 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 20 \\ 6 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 1000 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: x \\ \\ \frac{20}{x} = \frac{500}{1000} . \frac{</strong><strong>3</strong><strong>}{</strong><strong>6</strong><strong>} \\ \frac{20}{x} = \frac{5}{10} . \frac{</strong><strong>3</strong><strong>}{</strong><strong>6</strong><strong>} \\ \frac{20}{x} = \frac{</strong><strong>1</strong><strong>5</strong><strong>}{</strong><strong>6</strong><strong>0</strong><strong>} \\ </strong><strong>1</strong><strong>5</strong><strong>x = 20.</strong><strong>6</strong><strong>0</strong><strong> \\ </strong><strong>1</strong><strong>5</strong><strong>x = </strong><strong>1</strong><strong>2</strong><strong>0</strong><strong>0</strong><strong> \\ x = \frac</strong><strong>{</strong><strong>1</strong><strong>2</strong><strong>0</strong><strong>0</strong><strong>}{</strong><strong>1</strong><strong>5</strong><strong>} = </strong><strong>8</strong><strong>0</strong><strong>minutos$