Question

A train traveled at a constant speed

for six hours and traveled a distance of
408 miles. What is the best estimate
of the number of miles the train could
travel in 2.5 hours?

Answer 1

170

Explanation:

you have to set up a proportion and cross multiply.

`(408 \: miles)/(6 \: hours) = (x \: miles)/(2.5 \: hours)`

that would cross multiply to

`408 \: miles \: * 2.5 \: hours \: = 6 \: hours \: * x \: miles`

which would simplify to

`1020 = 6x`

then, you isolate x by dividing 6 from both sides to get the final answer of

`170 \: miles = x`