Difference between revisions of "2023 AMC 8 Problems/Problem 11"

(Solution 1)
m (Animated Video Solution)
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~MathFun1000
 
~MathFun1000
  
==Animated Video Solution==
+
==Video Solution (Animated)==
 
https://youtu.be/hwR2VM9tHJ0
 
https://youtu.be/hwR2VM9tHJ0
  
 
~Star League (https://starleague.us)
 
~Star League (https://starleague.us)

Revision as of 00:35, 25 January 2023

Solution 1

Since the answers are so far apart, we just need to compute the # of figures the answer contains. So by approximating all the values for the hourly rate we have $\frac{300,000,000}{5 * 30 * 30} \approx \frac{300,000,000}{5000} = 60,000$ which is $\boxed{\text{(C)}60,000}$

~apex304 and SohumUttamchandani

Solution 2

$292,526,838$ miles is extremely close to $300,000,000$ miles. We also know that $6.5$ months is equivalent to $6.5\cdot30\cdot24$ hours. Now, we can calculate the speed in miles per hour, which we find is about $\boxed{\textbf{(C) }60,000}$.

\[\dfrac{300,000,000}{6.5\cdot30\cdot24}=\dfrac{10,000,000}{6.5\cdot24}\\ =\dfrac{10,000,000}{13\cdot12}\\ =\dfrac{10,000,000}{156}\\ \approx\dfrac{10,000,000}{150}\\ \approx\dfrac{200,000}{3}\\ \approx60,000\]

~MathFun1000

Video Solution (Animated)

https://youtu.be/hwR2VM9tHJ0

~Star League (https://starleague.us)