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primary 6 | Maths | Speed
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Cindy
Cindy

primary 6 chevron_right Maths chevron_right Speed chevron_right Singapore

Please help, thank you.

Date Posted: 4 years ago
Views: 287
snell
Snell
4 years ago
X
speed: 68 km/h
time: t
distance = 68 x t = 68t

Y
speed: 76 km/h
time: t
distance = 76 x t = 76t

76t - 68t = 36 x 2
t = 9

distance between A & B is
( 68x9 + 36 ) x 2 = 648 x 2 = 1296 km


...
Cindy
Cindy
4 years ago
May i know why 76t-68t=36x2 ?
Thank you.
snell
Snell
4 years ago
half of A to B = 68t + 36

&

half of A to B = 76t - 36

*u can refer to the diagram in qn
Cindy
Cindy
4 years ago
Noted, thank you

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Zhang zhongming
Zhang Zhongming's answer
9 answers (Tutor Details)
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Cindy
Cindy
4 years ago
Thank you
Cindy
Cindy
4 years ago
Thank you