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primary 6 | Maths | Speed
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Keson
Keson

primary 6 chevron_right Maths chevron_right Speed

Plz help without using algebra, thx

Date Posted: 1 year ago
Views: 72

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Ben Looi
Ben Looi's answer
18 answers (Tutor Details)
1st
Take their combined sewing rate for 3 hrs.
So in 3 hrs, R can sew 32*3 and 7J can sew 32 buttons. Together they can sew 128 buttons in 3 hrs.
Solve for their combined average speed for sewing 1 button in minutes.
180mins/128= 1.406mins
Multiply by 32 buttons = 45 mins
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Eunice
Eunice's answer
3 answers (A Helpful Person)