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P6 Mathematics Sun, 12/08/2018 6:08pm
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Hi Teacher, please help.
- Mabel passed by her father at 8:30am (915am minus 45 minutes)
- Distance traveled by Father from 8:30am to 9:15am: 68km/h * (45min / 60min) = 51km
- Distance covered by Father in 45 minutes plus 3km is equivalent to the distance Mabel traveled in 30mins from 8:00am to 8:30am: 51km + 3km = 54km
- Therefore, Mabel’s speed is 54km * (60min / 30min) = 108km/h