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Maths, Addmaths and Statistics: Post your doubts here!

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Nov 2007 P2 Q.6
6ai) 6
6aii) The area of the large circle would be pi x 15^2
6aiii) it would be area of large circle - area of all other circles
Then the answer would be divided by 6.
6bi) It is an equilateral triangle so angle would be 180/3 = 60
6bii) perimeter of one small cirlce + perimeter of 60 degrees of a small circle (60/360 x 2 x pi x 5) + perimeter of 60 degrees of the bigger circle (60/360 x 2 x pi x 15)
 
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6ai) 6
6aii) The area of the large circle would be pi x 15^2
6aiii) it would be area of large circle - area of all other circles
Then the answer would be divided by 6.
6bi) It is an equilateral triangle so angle would be 180/3 = 60
6bii) perimeter of one small cirlce + perimeter of 60 degrees of a small circle (60/360 x 2 x pi x 5) + perimeter of 60 degrees of the bigger circle (60/360 x 2 x pi x 15)
its not an equilateral triangle
 
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have you solved it or u r just challanging him?
have you solved it or u r just challanging him?
You reply here?

200-gif.44227
 
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I Suck at Equations mostly like this :

:)

  1. A person travel 6km/h on the way office and gets back at 4km/h! Total Journey is 45 Minutes...... Calculate distance
  2. A number is 5 times 2nd number. If 8 is added to both, the 1st number would still be 3times second! What are the numbers?
  3. Ali and Zain Paint a house in 12 days, zain and Shaz do it in 15 days while Ali and Shaz take 20 days! How long it will take if all 3 paint together?
Thanks in Advance!
Q1
let the distance to office be 's'
time takes to go = t (speed = 6) (distance = s)
time taken when coming back = 45 - t (speed = 4) (distance = s)

by using the formula distance = speed * time
4 (45-t) = 6 t
solve the eq and find out the value of t, then put it in the eq "6 t = s" and u'll get the value of s

Q2
one number = x
second number = y

"A number is 5 times 2nd number" ------> y = 5x
"If 8 is added to both, the 1st number would still be 3times second" -------> y+8 = 3(x+8)
solve the eq.

Q3
I've done a lot of this typa Qs, cant recall the solution right now. wait.
 
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Q1
let the distance to office be 's'
time takes to go = t (speed = 6) (distance = s)
time taken when coming back = 45 - t (speed = 4) (distance = s)

by using the formula distance = speed * time
4 (45-t) = 6 t
solve the eq and find out the value of t, then put it in the eq "6 t = s" and u'll get the value of s

Q2
one number = x
second number = y

"A number is 5 times 2nd number" ------> y = 5x
"If 8 is added to both, the 1st number would still be 3times second" -------> y+8 = 3(x+8)
solve the eq.

Q3
I've done a lot of this typa Qs, cant recall the solution right now. wait.
Q1:

4 (45-t) = 6t
180-4t=6t
180-4t+4t=6t+4t
180=10t
t=18
S=18minutes x
s= 1.8
Right? :) ***amd*** @
 
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