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# How to do quick conversion with these different metrics? Can

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Manager
Joined: 13 Jul 2007
Posts: 121
How to do quick conversion with these different metrics? Can [#permalink]

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13 Oct 2007, 07:28
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

How to do quick conversion with these different metrics? Can you show how you do it so its quicker? Say for st2 to get to miles/hr.[/b]
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VP
Joined: 08 Jun 2005
Posts: 1145

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13 Oct 2007, 07:58
statement 1

you are really being asked for is 10/x > 2 ? ---> via = time*speed

is 5 > x ---> speed in miles

to convert always use fractions = 1 mile = 8/5 km

5*8/5 = 8 --> five mile per hour converted into km per hour

so is 8 > x where x < 6.4 km ? ---> sufficient

statement 2

9 minutes per km is equal to 9*5/8 minutes per mile = 45/8

since via = time*speed then:

is 5 > x ---> speed in miles ?

45/8 --> in minutes ---> 60/(45/8) in hours ---> 10.66 miles per hour

is (50/8)/10.66 > 2 ?

sufficient

13 Oct 2007, 07:58
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