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Maths, Addmaths and Statistics: Post your doubts here!

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***amd*** ,Awesome12 ,Dark Destination
Could you guys or anyone else please tell me how to do this sum from ON 2012 P21View attachment 38630
(a) Bill is y years old
Ada is x years old
Last year Bill was 6x
Lets assume that Ada was 3 years old last year. Bill was 6(3) = 18
This year Ada will be 4 years old, and Bill will be 19.
Bill's age = 6(Ada's age) -5
19 = 6(4) -5
19=19
y=6x-5

(b) in 19 years time; Ada will be x+19, and Bill will be y + 19
They have stated that in 19 years time, Bill will be twice as old as Ada
2 (x+19) = y+19
SOLVE FOR y
y=2x+19
 
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Ratio of lengths is 1:3 so area is square that is 1:9.So PST is 1 and PQR is 9.Since the trapezium is the larger triangle minus the smaller one it will be 9-1=8.So their ratio will be 9:8
 
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