2Transformer:

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Pls help. Thanks in advance...

a) 8100/180=45 cm

b) 180-26-26=124
....124/4=31
No of posts on each semicirlce=31+2=33
33-1=32
32x45=1440 cm


Check: No of posts of each length =31+26+2=59
59-1=58
58x45=2610 cm
Perimeter of the figure=1440+1440+2610+2610=8100cm

2nd Question:



http://i60.tinypic.com/r1bipz.jpg\">



Can someone help? TIA....

Pls help on 2nd Q ASAP.
TIA

25-1=24
24/2=12
35-1=34
34/2=17
12x17=204 (black tiles)
Total file=25x35=875
White tiles=875-204=671

S-H:

S-H:

Hi, pls help another qtn, thanks.


Beaker x and y contain some water. If 50ml of water is transferred from beaker x to beaker y, there will be 3/7 as much water in beaker x as in beaker y, if 100ml of waer is transferred from beaker y to beaker x, there will be 4 times as much waer in beaker x as in beaker y. How much water is there in beaker y?

Pls kindly help the above qtn, TIA!

This double \"if\" question, the total amount of water are the same
X.............Y......Total
3u.............7u....10u
+50.........-50................(reverse the 1st if)
+100........-100..............(execute the 2nd if).
8u.............2u.....10u

Y:....7u-2u=5u-->50+150=150
so 1u=150/5=30

Amount of water in beaker Y=7u-50
......................................=7x30-50
......................................=210-50=160

Starbear:

http://i60.tinypic.com/2cdhlxg.jpg\">





Can someone help? :?

Solution found on Page 1053
http://www.kiasuparents.com/kiasu/forum ... hilit=4960

chloecube:

sorry, 1 more question


at 8.30am, Ann left city A for City B, travelling at a constant speed. sarah left 1 hr later, travelling the same route. Sarah overtook Ann at 12.30pm. Sarah travelled at 18km/h faster than Ann. what is the speed of Ann?

i understand that every 1 hr sarah travels, she is 18km more than Ann
so i take 18 x 3hr = 54km

...after that i am stuck

City A............................................City B
A____|..1hr.....|.......3hr.................|
S____|....................3h..................|
.......|............|<----equal distance--->|
Sarah took 3hrs to overtake Ann, she will have travelled 3x18=54km longer than Ann. From the above diagram, the distance travelled by Ann for the 1st hour will be 54km.
Speed of Ann=54/1=54km/h

chloecube:

at 0700hr, Cindy cycled from Town X to Town Y at an average speed of 16km/h. 3/4 hour later, Rella cycled from Town Y to Town X at an average speed of 24km/h. both of them reached their respective destinations at the same time. what was the time taken for Cindy to tracvel from Town X to Town Y?


Hansel and Gretal cycled from Cake city to sweet city at 11km/h and 8km/h respectively. Hansel left cake city an hour later than Gretal. he arrived at Sweet city 1/2 hour earlier than Gretal. how long did Hansel take?

thanks a lot!

X-----------------------------------------------------Y
....12km...|................2u.....................
................................3u.....................

1st 3/4h Cindy travelled
3/4 x 16 =12km

Cindy:Rella
....16:24
......2:3
1u=12
3u=36
Time taken:36/16=9/4h=2h15min





...Cake.........................................................Sweet
Gretal|..8km..|..............8u...................|..4km|
Hansel..........................11u...........................|

1st hour by Gretal=1x8=8km
1/2h to reach Sweet City by Gretal=1/2x8=4km

Hansel:Gretal
......11:8
3u=12
1u=4
11u=11x4=44
Time taken=44/11=4h

Starbear:

http://i60.tinypic.com/2lik09u.jpg\">





Pls help.

45%=9/20 10%=1/10

1/3---->9C+1B
2/3---->18C+2B, also
2/3---->11C+9B
18C+2B=11C+9B
=>7C=7B
=>1C=1B

Given 11C-9B=10
Then 11C-9C=10
so 2C=10
=>20C=10x10=100 (chicken pies)

Starbear:

http://i61.tinypic.com/2h5oe2p.jpg\">





Can someone help?

----.----.----.----.----.----.6 black dots (24cm)
------.------.------.------.4 red dots (24cm)
every 24cm difference =6-4=2 dots
No of sets=32/2=16
Length of paper=16x24 + 1 + 1=386

Starbear:

http://i61.tinypic.com/2r7buao.jpg\">



Can someone help?

Area of big semicirlce=1/2Лx18x18=162Л
Area of rectangle= 18x9=162
Area of a small cirlce=Лx9x9=81Л (form by 1small semicirlce,2quadrants
Area of shaded part=162Л-81Л-162=81Л-162

Starbear:

http://i58.tinypic.com/25s4bif.jpg\">




Pls help.

Total amount =$3x X 2=$6x
Per group= $5+$10=$15
No of $10 notes=$(6x)/$15=(2x)/5