If a snail can move i inches in m minutes, then how many feet it can move in h hours?
A 5hi/m
B 60hi/m
C hi/12m
D 5m/hi
E 5him
[spoiler]OA=A[/spoiler].
How can I majke the transformation of units? Experts, can you show me how you'd solve it? Thanks.
If a snail can move i inches in m minutes, then how many
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Hi Gmat_mission,
To start, I'm going to change the variable "i" to "L" (so that it will be easier to see that variable).
We're told that a snail can move L INCHES in M MINUTES. We're asked for the number of FEET the snail can move in H HOURS. This question can be solved by TESTing VALUES (although you have to pay careful attention to the UNITS involved).
IF...
L=2, M=3, then the snail moves 2 inches in 3 minutes... meaning it moves 40 inches in 60 minutes (re: 1 hour). So, H=1.
1 foot = 12 inches, so that snail will travel 40/12 feet in 1 hour. Thus, we're looking for an answer that equals 40/12 = 10/3 when we plug in L=2, M=3 and H=1 into the answers. There's only one answer that matches...
Final Answer: A
GMAT assassins aren't born, they're made,
Rich
To start, I'm going to change the variable "i" to "L" (so that it will be easier to see that variable).
We're told that a snail can move L INCHES in M MINUTES. We're asked for the number of FEET the snail can move in H HOURS. This question can be solved by TESTing VALUES (although you have to pay careful attention to the UNITS involved).
IF...
L=2, M=3, then the snail moves 2 inches in 3 minutes... meaning it moves 40 inches in 60 minutes (re: 1 hour). So, H=1.
1 foot = 12 inches, so that snail will travel 40/12 feet in 1 hour. Thus, we're looking for an answer that equals 40/12 = 10/3 when we plug in L=2, M=3 and H=1 into the answers. There's only one answer that matches...
Final Answer: A
GMAT assassins aren't born, they're made,
Rich
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The rate of the snail is i/m inches per minute.Gmat_mission wrote:If a snail can move i inches in m minutes, then how many feet it can move in h hours?
A 5hi/m
B 60hi/m
C hi/12m
D 5m/hi
E 5him
Since h hours = 60h minutes, then in h hours the snail can move i/m x 60h = 60hi/m inches and 60hi/m inches = (60hi/m)/12 = 60hi/(12m) = 5hi/m feet.
Answer: A
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