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 tooDaddy wrote:Thank Nebbermind.Why u square root 196,even if 196 is a triangle?And how is 14 the radius of the circle?Nebbermind wrote:Daddy wrote: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

## Q&A - PSLE Math

### Re: Q&A - PSLE Math

### Re: Q&A - PSLE Math

(a)EC72 wrote: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?

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....

### Re: Q&A - PSLE Math

I think that Town B is in on the way to Town C.pirate wrote:(a)EC72 wrote: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?

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....

### Re: Q&A - PSLE Math

So much for precision in the use of language...DearSonR wrote:I think that Town B is in on the way to Town C.

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- BlueBelt
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### Re: Q&A - PSLE Math

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

- Nebbermind
- KiasuGrandMaster
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### Re: Q&A - PSLE Math

pirate wrote:So much for precision in the use of language...DearSonR wrote:I think that Town B is in on the way to Town C.

### Re: Q&A - PSLE Math

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.

Very helpful for students.

### Re: Q&A - PSLE Math

Are you mocking homework by creating that site?GingerCub wrote: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.