Joanne Toh
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Psle question. Thanks

Replies 1
Jojo Celestino

If by the halfway point the daughter is 300 m behind, since they are both running at a uniform speed, by the time the father reached the end point, the distance between them have doubled. This means that the daughter covered the remaining 600 m of the course in 5 minutes making her speed 120 m/min. In 35 minutes, she would have covered 120m/min x 35min which is 4200m but at this time, she was 300m away from the halfway point so half of the distance of the route is 4200m + 300m making it 4500m. Since 4500m is half of the route, the route is 9000m.. Hope this helps.. :)

6 years ago

Joanne Toh
Asked 9 years ago

SG chevron_right chevron_right

Another question . P6

Replies 1
Maggie Lukes

From the arrangement, we see that the length of one tile is three times the width. The width of the path is 60 cm, so one length plus one width = 60. 4 widths = 60, so the width of one tile is 15 cm. If we look at each group of 4 tiles, the length is 3x15=45 cm. Therefore in 18 m (1800 cm) we have 1800/45 = 40 groups of tiles. Each group has 4 tiles so the total is 160 tiles.

6 years ago

Joanne Toh
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Please help ! Thanks in advance

Replies 1
Yap Michelle

6 years ago

Carol Ho
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

Please help with p5 qn. Thanks.

Replies 7
Yap Michelle

Before n after model.

6 years ago
Yap Michelle

Sorry. Forgot about the difference.

6 years ago
Xavier Sng

The initial ratio 2 : 5 = 12 : 30 3/4 of apples were given away, leaving 1/4 of apples The ratio changed to 1/4 × 12 : 30 = 3 : 30 Since the ratio changed to the final 3 : 5 after 75 oranges were given away, 30 - 5 = 25 units -> 75 fruits 1 unit = 3 30 - 12 = 18 units = 54 more oranges than apples initially.

6 years ago
Carol Ho

Thanks for your explanation:)

6 years ago
Xavier Sng

The pleasure is mine, thank you. Regards

6 years ago
Carol Ho

May I know why need to x6 to make it to 12:30?

6 years ago
Xavier Sng

In the final ratio we have 3 : 5 which the 3 is attributed to the apples. Since that was 1/4 of the initial number of apples, it will make it easier to work out the solution if the number of apples started off with 12 parts.

6 years ago

Tay Pe Ho
Asked 9 years ago

SG chevron_right Primary 4 chevron_right Geometry

Hi, Please help on P4 math question 8(b) for get Tessellation 2. Thanks！

Replies 0

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