https's answer to GT's Primary 6 Maths Singapore question.
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Effective speed:
A - B = 100m ÷ 2min = 50m/min
A - C = (100m + 300m) ÷ (2min + 2min) = 100m/min
B - C = 100m/min - 50m/min = 50m/min
300m ÷ 50m/min = 6min
6min after 8.30am = 8.36am (Ans)
The info 140m/min is redundant.
A - B = 100m ÷ 2min = 50m/min
A - C = (100m + 300m) ÷ (2min + 2min) = 100m/min
B - C = 100m/min - 50m/min = 50m/min
300m ÷ 50m/min = 6min
6min after 8.30am = 8.36am (Ans)
The info 140m/min is redundant.
Date Posted:
3 months ago
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