
By: JessicaTan (offline) Wednesday, September 05 2012 @ 09:49 AM CDT (Read 894 times)



JessicaTan 
Hi, kindly help with working solution.
9) Ravish spent 0.8 of her savings for a holiday with her family? She had $750 left after depositing 0.7 of her remaining savings into her bank account. How much money did she spend for the holiday? (ans : $10000)
13) 50% of the capacity of Jug A is equal to 1 3/4 of the capacity of Jug B.
(a) Find the capacity of Jug B as a fraction of the capacity of Jug A. Express your answer in the simplest form.
(ans : 2/7)
(b) If Jug B can store 500ml of liquid, what is the maximum amount of liquid that Jug A can hold? express your answer in liters. (ans : 1.75 liters)
14) the ratio of the number of visitors in exhibition Hall A to the number of visitors in exhibition Hall B was 1 : 4. The number of visitors in exhibition Hall B was 60% of exhibition Hall C. If exhibition Hall A has 450 visitors, find the number of visitors
In exhibition Hall C. (ans : 3000)
Thanks .

Regular Member
Registered: 10/17/09 Posts: 82





By: echeewh (offline) Thursday, October 04 2012 @ 09:19 PM CDT



echeewh 
Hey Jessica.
Following pls find my worked solutions:
Q9
Spent  0.8; Remain  0.2
Deposit  0.7 of <Remain>; Left  0.3 of <Remain>
Left  0.3 of <Remain> = 0.3 x 0.2 = 0.06
0.06 > 750
Spent (holidays) = 0.8 > (750 / 0.06) x 0.8
= $10000
============================
Q13
(a)
Apply <Equal concept>, we have ...
(1/2) A = (7/4) B
Make numerator of both fractions to be the same by multiplying the left fraction 7x.
(7/14) A = (7/4) B
Denominator shows the initial / original number of units the respective jugs have.
A = 14u ; B = 4u
(B/A) = (4/14) = (2/7)
(b)
4u > 500
A = 14u > (500/4) x 14 = 1750 ml = 1.75 lit
============================
Q14
A : B
1 : 4
B = 60% of C = (6/10) C = (3/5) C
A : B : C
1 : 4  (1)
3 : 5  (2)
Apply <Repeated Identity concept>, multiply (1)x3; (2)x4
A : B : C
3 : 12
12 : 20
A = 3u > 450
1u > 150
C = 20u > 20 x 150 = 3000
==============================
Trust these helps.
Do let me know again if there are any clarifications.
Cheers,
Edward

Active Member
Registered: 04/21/11 Posts: 625



