If 1 kilometer is approximately 0.6 mile, which of the following best approximates the number of kilometers in 2 miles?
(A) 10/3
(B) 3
(C) 6/5
(D) 1/3
(E) 3/10
OA: A
OG2016 PS If 1 kilometer is
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Let's use equivalent ratios...lionsshare wrote:If 1 kilometer is approximately 0.6 mile, which of the following best approximates the number of kilometers in 2 miles?
(A) 10/3
(B) 3
(C) 6/5
(D) 1/3
(E) 3/10
OA: A
We'll compare ratios in the form kilometers/miles
If 1 kilometer is approximately 0.6 miles, which of the following best approximates the number of kilometers in 2 miles?
Let x = the number of kilometers that are equal to 2 miles
We can write the equation: 1/0.6 = x/2
Cross multiply to get: (1)(2) = (0.6)(x)
Simplify: 2 = 0.6x
Rewrite 0.6 as a fraction to get: 2 = (3/5)x
Multiply both sides by 5/3 to get: (5/3)(2) = (5/3)(3/5)x
Simplify: 10/3 = x
Answer: A
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Hi lionsshare,
We're told that 1 kilometer is approximately 0.6 miles. We're asked which answer best approximates the number of kilometers in 2 miles.
While the answer choices to this question are all fractions, they are 'spaced out' enough that we can use them 'against' the prompt and avoid doing lots of math.
Since 1km = .6 miles, we can start 'counting' kilometers until we get close to the total that we're looking for....
1km = .6 miles
2km = 1.2 miles
3km = 1.8 miles
At this point, we're pretty close to 2 miles, but we would need a little more to get to that value. Thus, we're looking for an answer that is a little more than 3km. There's only one answer that fits.
Final Answer: A
GMAT assassins aren't born, they're made,
Rich
We're told that 1 kilometer is approximately 0.6 miles. We're asked which answer best approximates the number of kilometers in 2 miles.
While the answer choices to this question are all fractions, they are 'spaced out' enough that we can use them 'against' the prompt and avoid doing lots of math.
Since 1km = .6 miles, we can start 'counting' kilometers until we get close to the total that we're looking for....
1km = .6 miles
2km = 1.2 miles
3km = 1.8 miles
At this point, we're pretty close to 2 miles, but we would need a little more to get to that value. Thus, we're looking for an answer that is a little more than 3km. There's only one answer that fits.
Final Answer: A
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Rich
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We are given that 1 kilometer = ~ 0.6 mileslionsshare wrote:If 1 kilometer is approximately 0.6 mile, which of the following best approximates the number of kilometers in 2 miles?
(A) 10/3
(B) 3
(C) 6/5
(D) 1/3
(E) 3/10
OA: A
Thus, 1 mile = 1/0.6 kilometers
=> 2 miles = 2/0.6 kilometers
=> 2 miles = 1/0.3 kilometers
=> 2 miles = 1 / (3/10) kilometers
2 miles = ~10/3 kilometers
The correct answer: A
Hope this helps!
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To solve, we must convert 2 miles to kilometers. We are given that 1 kilometer = 0.6 mile. Thus, we can convert 2 miles to kilometers.lionsshare wrote:If 1 kilometer is approximately 0.6 mile, which of the following best approximates the number of kilometers in 2 miles?
(A) 10/3
(B) 3
(C) 6/5
(D) 1/3
(E) 3/10
2 miles x (1 kilometer)/(0.6 mile)
Notice that we put the unit "mile" in the denominator of our unit conversion ratio so that it will cancel out with "miles" in the numerator, and we will be left with kilometers.
2/0.6 kilometers
We can multiply the entire fraction by 10/10 to get rid of the decimal and we are left with:
20/6 = 10/3 kilometers
Answer: A
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