Micheal Lim
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Need help

Replies 1
Yeo See Yeong

6 years ago

Tracy Tan SG
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

Pls help with P5 question. Thank u!

Replies 3
Caleb Tey

6 years ago
Yeo See Yeong

6 years ago
Tracy Tan SG

Thank you very much! ☺☺☺

6 years ago

Adel Ong
Asked 9 years ago

SG chevron_right Primary 3 chevron_right Number and Algebra

Please help. Thanks to make it visual.

Replies 1
Adel Ong

Thank you!

6 years ago

Adaik Valli
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

My daughter need help for this question . Please help. Thanks in advance.

Replies 3
Jojo Celestino

If Tap X can fill the tank in 15 minutes, it means that 1/15 of the tank is filled every minute. Thus, after 4 minutes, 4/15 of the tank is filled while 11/15 still remained empty. If Tap Y can fill the tank in 8 minutes, then, it can fill 1/8 of the tank every minute. Since Taps X and Y are both turned on after the first 4 minutes, it means that they can fill the tank 1/15 + 1/8 every minute which is 23/120. 11/15 of the tank is still empty while the taps fill the tank at a rate of 23/120 of the tank per minute. To find the amount of time needed to completely fill the tank, it will be 11/15 divided by 23/120 which is 88/23 or 3 and 19/23 minutes. 4 minutes at the beginning and 3 and 19/23 minutes in the end, 7 and 19/23 minutes is needed to fill the tank completely. I hope this helps. P.S. Though the problem makes a lot of sense, the numbers used are not that friendly.

6 years ago
Adaik Valli

Thank you.

6 years ago
Jojo Celestino

No problem Miss..

6 years ago

Anna Tey
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

P5 Question, please help.thanks in advance!

Replies 2
Raymond Ng

Nice green colour paper

6 years ago
Anna Tey

Can understand better with the model, thanks Raymond :)

6 years ago

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