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primary 6 | Maths | Geometry
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Silin
Silin

primary 6 chevron_right Maths chevron_right Geometry chevron_right Singapore

Can anyone pls help me asap. Thanks

Date Posted: 1 month ago
Views: 22

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snell
Snell's answer
333 answers (A Helpful Person)
1st
W
dist. : 5d
time: t
speed: v

time t = 5d/v



Sam
dist. : 9d
time: t
speed: v+100

time t = 9d/(v+100)


at the same time t,
5d/v = 9d/(v+100)
5/v = 9/(v+100)
5v+500 = 9v
v = 125

Weili's speed is 125 m/min


...
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vicky
Vicky's answer
8 answers (Tutor Details)
Hope this helps!
Silin
Silin
1 month ago
Thanks alot