Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
primary 6 | Maths
2 Answers Below
Anyone can contribute an answer, even non-tutors.
Pls help. Thanks a lot.
Date Posted: 4 months ago
Views: 74
See 2 Answers
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Hope this helps
Date Posted:
4 months ago
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.
360 Tutoring Program