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The car travels 98 kilometers in 1.4 hours. How many kilometers will it travel in 2 hours?

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Question:

A
140 km.

explanation

This is a unit rate problem. Because the car covers 98 kilometers in 1.4 hours, we can set up the relationship below:

98 km/(1.4 hours) = x/(1 hour)

We first have to calculate how far the car travels in 1 hour. To get the distance the car covers in 1 hour, we have to divide both the numerator and denominator of the fraction on the left-hand side by 1.4.

(98 km/1.4)/(1.4 hours/1.4) = x/(1 hour)

= 70 km/(1 hour)

The car covers 70 kilometers per hour. We can then multiply the distance the car covers per hour by 2 to get how far it travels.

(2 hours) × (70 km/1 hour) = 140 km.

The car covers 140 km in 2 hours.

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