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Q.

A loaded truck travels 14 km in 25 minutes. If the speed remains the same, how far can it travel in 5 hours?

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a

168 km

b

120 km

c

140 km

d

150 km

answer is A.

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Detailed Solution

Given that a loaded truck travels 14 km in 25 minutes
By converting hours to minutes.
We have to find how much distance it will cover in 300 minutes.
As we know, the more the distance is covered by the truck, the more is the time taken by the truck. Hence, the problem is of direct proportion.
Let us suppose the truck travels x km in 300 minutes. So, our table looks like

Distance travelled	14	X
Time taken	25	300

Now, distance and time are in direct proportion, therefore

\frac{14}{25}

=

\frac{x}{300}

14 × 300 = 25x
25x = 14 × 300
x =

\frac{14 \times 300}{25}

x = 168 Therefore, truck travels 168 km in 300 minutes or we can say,
Truck travels 168 km in 5 hours.

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