Question

If it took 7 hours to mow 4 lawns, then at that rate, how many lawns could be mowed in 35 hours?

Answer 1

Resposta:

In this proportion, in 35 hours, 20 lawns will be cut.

Explicação passo a passo:

We can use a simple rule of three.

$\sf \dfrac{7}{4} = \dfrac{35}{x}\\\\7x = 4 \cdot 35\\7x = 140\\\\x = \dfrac{140}{7}\\\\\textbf{\textsf{x = 20}}$

Hope this helps :)