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P6 maths prelim tmr! Immediate replys needed!!!!!!
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TOPIC: P6 maths prelim tmr! Immediate replys needed!!!!!!
#4446
P6 maths prelim tmr! Immediate replys needed!!!!!! 1 Year, 5 Months ago Karma: 0
i need help for q. 47 nanyang 2008 prelim paper!!!
Quek Seow Khai Owen
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#4451
Re: P6 maths prelim tmr! Immediate replys needed!!!!!! 1 Year, 5 Months ago Karma: 0
Lily speed ratio
80:60
4:3
Ratio of speed is inverse of time
= 3:4

3/4-1/3 = 5/12 = 1u

For speed = 80km/hr
3u = 3X 5/12 = 15/12 = 5/4

5/4 X 80 = 100km

For speed of 90km/hr time taken = 100/90 = 10/9hour = 1 1/9hour
singalion
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