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primary 6 | Maths | Speed
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Genius On The Go

primary 6 chevron_right Maths chevron_right Speed chevron_right Singapore

Pls help me as soon as possible(ASAP)I would appreciate you help.

Date Posted: 5 years ago
Views: 479
J
J
5 years ago
Mid point means ½ the distance/race has been covered.


Since their speeds are constant throughout the race, this tells us that every ½ of the race Linda has cycled, May will be 4km in front/travelled 4km more.

Since 1 = ½ x 2,
4km x 2 = 8km


So when Linda has reached the finishing line , May would actually have been 8km ahead of her if she didn't stop at the line.

8km ÷ 15km/h
= 8/15 h
= 32/60 h
= 32 min


So this tells us that May would have been cycling for another 32 min (if she didn't stop) until Linda reached

But we know May didn't continue cycling. So she would actually have been waiting for 32min before Linda arrived. Which also means that May reached the finishing line 32 min before Linda.


So Linda reached 32 min later.

11.45 + 00.32 = 11.77
= 12.17

So she reached at 12.17pm
Genius on the go
Genius On The Go
5 years ago
Thank you so much
J
J
5 years ago
Welcome