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Playlist PSAT® Math 45 videos

0
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PSAT 1.1 Math Narrative Walkthrough. In how many hours will James and Steve meet?

1
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PSAT 1.2 Math Narrative Walkthrough. Which graph represents the equation?

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PSAT 1.3 Math Narrative Walkthrough. How many full packages of secret ingredient does the company have to buy to make one 50-gallon batch?

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PSAT 1.30 Math Diagnostic 177 Views


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Description:

PSAT 1.30 Math Diagnostic. How long would it take Wanda to finish a 2000-m race?


Transcript

00:00

Thank you We sneak and here's your shmoop too sure

00:05

brought to you by the fifty meter dash for when

00:07

you wanted to note a really long break in a

00:10

sentence Wanda runs the fifty meter dash in nine seconds

00:16

Her mile paces approximately three point two meters per second

00:20

If one two ran at her fifty meter pays for

00:22

the first five hundred meters and the remainder of the

00:24

race at her slower a mile paste Approximately how long

00:28

would it take wanda to finish a two thousand meter

00:31

race And here the potential answers meters and miles and

00:36

it's like oil and water right Well sounds like wanda

00:39

is lacking either in energy or motivation As the race

00:42

goes on maybe make her wear meat shorts and release

00:46

a hungry cheetah somewhere around fifty meter mark that helps

00:48

speed her up and make for some good entertainment until

00:52

the mauling began All right we take it back That's

00:54

Not the best idea All right So for five hundred

00:56

meters one fourth of the race wanda is booking along

01:00

at her fifty meter paste That which she can go

01:03

fifty meters in nine seconds for the other fifteen hundred

01:06

meters She slows to her mile pace of three point

01:09

two meters per second And this question wants to know

01:12

how much total time it'd take her to go Wire

01:14

the wire All right well let's just break it up

01:17

Almost as if this were to separate races and then

01:19

we'll just add the two times together Well if one

01:22

goes fifty meters in nine seconds then how long will

01:25

it take her to go Five hundred meters while five

01:27

hundred is fifty times ten So we'll have to multiply

01:30

her time by ten as well and looks like it

01:33

would take her in ninety seconds to go the first

01:35

five hundred meters then for the latter part of the

01:38

race No no not the latter part of the race

01:40

That would be too cruel Kind of funny He slows

01:43

to three point two meters per second So we're gonna

01:46

want to know how many times Three point two goes

01:48

into fifteen hundred Well fifteen hundred divided by three point

01:51

two is about four hundred sixty eight point seven Five

01:55

So that's how many seconds it will take her to

01:58

go the last fifteen hundred meters adding them together We

02:01

take ninety seconds Plus four hundred sixty eight Yeah Change

02:05

seconds to get five hundred fifty eight point seven six

02:09

seconds Which doesn't look anything like any of our answer

02:12

choices Oh yeah we're supposed to convert that into minutes

02:16

Celia's Well there are sixty seconds in a minute so

02:18

let's divide five fifty eight and changed by sixty and

02:21

we get nine minutes with a remainder of around nineteen

02:24

seconds which is option b We're glad we decided to

02:27

replace the meat shorts with carrot pants and the cheetah

02:30

with bunny rabbits It's still added an unforeseen challenge but

02:34

at least wanda will live to tell the tale Ah

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