Darren Du Yu Heng's answer to Yeo's Primary 6 Maths question.
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At 11am, Kathie is 120km from sunville. Perry at sunville.
So from 11am till they meet, Kathie travel 150km and Perry travel 270km.
So the time is 150/60=2.5hr.
(a) Perry speed is 270/2.5=108km/h
(b) 3pm Kathie travel 60x6=360km
3pm Perry travel 108x4=432km
432-360=72km
So from 11am till they meet, Kathie travel 150km and Perry travel 270km.
So the time is 150/60=2.5hr.
(a) Perry speed is 270/2.5=108km/h
(b) 3pm Kathie travel 60x6=360km
3pm Perry travel 108x4=432km
432-360=72km
Date Posted:
6 years ago
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