iMath | Community

Jane Choy

Asked 9 years ago

SG Primary 6 Measurement

Please help - question for P6. Many Thanks.

Replies 9

Dai Jiawen

120=LxB 72=BxH 60=LxH 120x72x60=518400 LxBxBxHxLxH=518400 L2xB2xH2=518400 sq root of L2xB2xH2 = LxBxH = 720cm3 = volume

6 years ago

Xavier Sng

120 = 12 × 10 60 = 10 × 6 72 = 12 × 6 So the dimensions are 12 cm by 10 cm by 6 cm Volume = 720 cubic cm

6 years ago

Wahidah Khan

720 cm cube because if one side is 120= 10 x12 60= 10 x 6 72 = 12 x 6 so its 12 by 10 by 6 = 720

6 years ago

Soo Vei Li

Drawing a diagram will help us see how the factors of the three numbers are related -- that they must share common factors because each pair of faces will share an edge.

6 years ago

Wahidah Khan

yes its easier

6 years ago

Jane Choy

Thanks for all your help.

6 years ago

Valerie Chan Yan Yi

Is this a cubic box or rectangular box? To me it is not clear

6 years ago

Soo Vei Li

If it is a cube, all the faces would have the same area.

6 years ago

Valerie Chan Yan Yi

Oh ok thanks so much

6 years ago

Jason Khng

Asked 9 years ago

SG Primary 6 Number and Algebra

Pls help

Replies 3

Xavier Sng

(b) In 70 min, the faster machine was 70×6= 420 copies ahead which the slower machine needed 100-70= 30 min to print. Hence the slower machine printed 420÷30 = 14 copies a min. In 100 min the slower machine printed 14×100= 1400 copies, double that to a total of 2800 copies for both machines.

6 years ago