Monday, August 1, 2011

(Viva Voce) Chap 9 Exercise 9 Question 6

http://www.youtube.com/watch?v=a4zDyjlh5yk
Please go to the above website to see my Viva Voce (not sure if spelt correctly…) Sorry for small text and weird sounds…
The steps:

(a) Simplify each of the following ratios

(i) a : b = 1 1/2 : 2 2/5 (ii) b : c = 0.105 : 0.350
(i) a : b = 1 1/2 : 2 2/5--> 1.5: 2.4 --> 15:24--> 5:8
(ii) b : c = 0.105 : 0.350-->105:350 --> 3: 10

(b) Find the ratio a : b : c using the data in (a)

a : b : c 
5 : 8
     3 : 10
15:24:80

(c) Alan, Bob and Cathy share $500 in the ratio a : b : c found in (b). Find Alan's share correct to 2 decimal places.

500/(15+24+80)=500/(119)
                       =4.201680672
                       =4.2
4.2*15=63

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