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primary 6 | Maths | Speed
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Dee
Dee

primary 6 chevron_right Maths chevron_right Speed chevron_right Singapore

Please help me with this question. Thank you.

Date Posted: 4 years ago
Views: 595
snell
Snell
4 years ago
total dist. = d

total time if walking = d/60

total time if jogging = d/80

difference in duration = d/60 - d/80
= d/240

d/240 = 10
d = 2400 m

distance between houses is 2.4 km


ALT

total time if walking = t+16
total distance = (t+16) x 60

total time if jogging = t+6
total distance = (t+6) x 80

(t+16) x 60 = (t+6) x 80
t = 24

distance between houses
= (24+16) x 60
= 2400 m

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Kerry
Kerry's answer
6 answers (Tutor Details)
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Dee
Dee
4 years ago
Thank you!
Dee
Dee
4 years ago
Thank you.