Serene Koon
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Replies 1
Jason Oon

a) 12 mins = 12/60 hour = 1/5 hr Hence, 85 / 5 = 17km 817 - 17 = 800km away b) For this question, in order for them to pass each other, both altogether should cover the total distance. Therefore, add up both average speed, 85 +75 = 160 800 / 160 = 5 hours 1000 + 0500 = 1500hrs / 3pm

6 years ago

Serene Koon
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Replies 1
Jason Oon

Using ratio, you will be able to find how much time is spent for each journey. A to B : B to A 6 : 4 3 : 2 X 2hours : 3hours 2h x 6km/h = 3h x 4km/h Hence, the distance is 12km.

6 years ago

Serene Koon
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Replies 5
Jason Oon

a) 8 x 20 = 160m b) In order for train to pass the bridge completely, you need to add train length to bridge length. 920 + 160 = 1080 1080 / 24 = 45s

6 years ago
Jason Oon

c) 33 x 12 = 396m 396 - 256 = 140m

6 years ago
Serene Koon

Without yr help we could not proceed to the next topic. Thanks Jason Oon.

6 years ago
Jason Oon

It's my pleasure. All the best to your son, continue to work hard.

6 years ago
Serene Koon

sure! :)

6 years ago

Serene Koon
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Can someone help on these P6math.TIA

Replies 0

Serene Koon
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Replies 5
Jason Oon

a) Since Sherise's mother grabbed her homework (12 minutes after Sherise left home) and ran towards her without delay, 60 x 12 = 720m 140 - 60 = 80 720 / 80 = 9 minutes later

6 years ago
Jason Oon

b) Most direct way is to use 9 mins x 140 m/min = 1260m

6 years ago
Jason Oon

Moral of this question: Mothers are the greatest, we have to cherish them.

6 years ago
Serene Koon

ha....ha....

6 years ago
Serene Koon

will post q done by my boy. Hope he gets correct.

6 years ago

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