Q&A - PSLE Math

[Ender]

Thank Nebbermind.

Hi all, need help on these questions.

The shaded triangles form a square of side 14.
Radius of circle is 14
Perimeter = (3/4 * 2 * pi * 14) + 14 + 14

Why u square root 196,even if 196 is a triangle?And how is 14 the radius of the circle?

Because the two triangles are RIGHT angle ISOCELES triangle. You put them back to back they form a square of area 196 cm2 . The sides of the sqaure happen to be the radius too

[DearSonR]

Oops! My reply is wrong, sorry if i am misleading anyone... Should I delete it?

[pirate]

The distance between Town A and Town C is 825 km. Bob set off from Town A at 1.30 p.m., at an average speed of 60 km/h. At 2.45 p.m., Carl also set off from Town A to Town B at an average speed of 75 km/h. Carl arrived at Town B at 10.45 p.m.


(a) At what time did Carl overtake Bob?


(b) How long did Bob take to travel from Town B to Town C if he increased his speed by 50% starting from Town B?

(a)
Town C ----- 825 km ----- Town A ----- x km ----- Town B.

Never. Town B and Town C are in opposite directions from Town A.


(b) Town B is 8 * 75 = 600 km from Town A
Therefore Town C and Town B is 600 + 825 = 1,425 km apart....

[DearSonR]

The distance between Town A and Town C is 825 km. Bob set off from Town A at 1.30 p.m., at an average speed of 60 km/h. At 2.45 p.m., Carl also set off from Town A to Town B at an average speed of 75 km/h. Carl arrived at Town B at 10.45 p.m.


(a) At what time did Carl overtake Bob?


(b) How long did Bob take to travel from Town B to Town C if he increased his speed by 50% starting from Town B?

(a)
Town C ----- 825 km ----- Town A ----- x km ----- Town B.

Never. Town B and Town C are in opposite directions from Town A.


(b) Town B is 8 * 75 = 600 km from Town A
Therefore Town C and Town B is 600 + 825 = 1,425 km apart....

I think that Town B is in on the way to Town C.

[pirate]

I think that Town B is in on the way to Town C.

So much for precision in the use of language...

[Swift Formula]

Oops! My reply is wrong, sorry if i am misleading anyone... Should I delete it?

Edit it? xD

[Nebbermind]

I think that Town B is in on the way to Town C.

So much for precision in the use of language...

[GingerCub]

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[sushi88]

Don't know if all the answers given are correct. In my opinion, to make sure you have done everything for getting A, try to use services like this http://justdomyhomework.com/
Very helpful for students.

Are you mocking homework by creating that site?

[Daddy]

Thank you Nebbermind.

post another question for help.