AC Lim's answer to neha's Primary 5 Maths Whole Numbers Singapore question.
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Old speed =75m/min
New speed = 90m/min
Time difference = 4 min
Time = distance / speed
D/75 - D/90 =4
D/450 = 4
D = 4 × 450
D = 1800m.
Hope this helps
New speed = 90m/min
Time difference = 4 min
Time = distance / speed
D/75 - D/90 =4
D/450 = 4
D = 4 × 450
D = 1800m.
Hope this helps
Date Posted:
4 years ago
thanks a lot !!!
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