Maths, Addmaths and Statistics: Post your doubts here!

[Dukeofwin]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w10_qp_12.pdf
25 Part a) please!

 

[convent2012]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w10_qp_12.pdf
Part a) please!

ques no ??

 

[Dukeofwin]

ques no ??

Oops, real sorry. Q25

 

[kitecrystal]

Oops, real sorry. Q25

is the answer 30s?

 

[syed1995]

is the answer 30s?

Yes .. I have done it countless times on this thread ..

first answer is 30 other is 90.

How don't ask.

 

[Translucent231]

If a workforce of 20 can produce 12 cars in 15 days, how many workers should be used if 15 cars are needed in 10 days? :S

 

[syed1995]

If a workforce of 20 can produce 12 cars in 15 days, how many workers should be used if 15 cars are needed in 10 days? :S

ooo .. i loved these .. haven't seen one in a long time! where did you get it from? past paper year?

 

[khizer shahab]

 

[syed1995]

View attachment 11995

(n-2)*180/n=160

180n-360=160n
20n=360
n=18

 

[rabiafarooq101]

View attachment 11995

180 _160= 20

360/n

360/20= 18 sides

 

[Vogue]

plz help
a map has a scale 2cm to 5 km
on the map the area of the lake is 8 cm^2 ( 8 cm square)
calculate the actual area of the lake?

 

[syed1995]

If a workforce of 20 can produce 12 cars in 15 days, how many workers should be used if 15 cars are needed in 10 days? :S

Is the answer 75?

 

[syed1995]

plz help
a map has a scale 2cm to 5 km
on the map the area of the lake is 8 cm^2 ( 8 cm square)
calculate the actual area of the lake?

50 km^2 .. is the answer correct?

 

[Vogue]

write down a square # that is a factor of 75?????

 

[syed1995]

180 _160= 20

360/n

360/20= 18 sides

nice one! .. 180-160 = ext angle ..

360/n = ext angle!

 

[syed1995]

write down a square # that is a factor of 75?????

75=3*5*5

25 answer.

 

[rabiafarooq101]

nice one! .. 180-160 = ext angle ..

360/n = ext angle!

shortest one too

 

[Vogue]

50 km^2 .. is the answer correct?

yes its 50
but how??????

 

[syed1995]

shortest one too

yea thanks this method is really easy .. and takes no time!

 

[syed1995]

yes its 50
but how??????

2:5 for length.
for area we square it.
2^2:5^2
4:25 for area.

and the area was 8cm^2

4*2=8
25*2=50km^2 answer