Question

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Kala drove 469 miles in 7 hours.
At the same rate, how long would it take her to drive 804 miles?

Answer 1

Explanation:

Distance travelled by Kala in 7 hours= 469 mi.

Distance travelled by Kala in 1 hour=
`(469)/(7)`

= 67 mi.

Time taken by Kala to travel 804 miles=
`(804)/(67)`

= 12 hours

∴ it will take her 12 hours to cover a distance of 804 miles.

Answer 2

12 hours

Explanation:

using the relationship

D = ST ( D is distance, S is average speed and T is time in hours )

calculate average speed by dividing both sides by T

S =
`(D)/(T)` =
`(469)/(7)` = 67 mph

calculate time by dividing both sides by S

T =
`(D)/(S)` =
`(804)/(67)` = 12 hours