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primary 6 | Maths | Speed
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Candy
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primary 6 chevron_right Maths chevron_right Speed chevron_right Singapore

Pls help. Tks

Date Posted: 4 weeks ago
Views: 23
snell
Snell
4 weeks ago
note:
dist. betw. P & Q is unknown


David
speed: 80 km/h
time: 3h 40 min = 3 2/3 h
dist. moved = 293 1/3 km

Saul
speed: 96 km/h
time: 3h 20 min = 3 1/3 h
dist. moved = 320 km

so
dist. betw. P & Q is 613 1/3 km


time taken by David to reach Q
= 613 1/3 ÷ 80 = 7 2/3 h
= 7 h 40 min

time reach Q is 4. 40 p.m.


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Sin Yee
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