PLS. ANSWER THE FOLLOWING
1. Mr. Lim invested one third of his money at 10% per year and the remaining amount at 15% per year. If he got a total annual income of P34,400.00 for the two investment,how much did he invest at each rate? How much was his original money?
2. how many liters of pure alcohol must be added to 5 liter of 20% alcohol to make a 70% alcohol solution?
PLS WITH SOLUTION
Share
1. 1/3* 258000=86,000 sa first na 10%
2/3* 258,000= 172,000 sa second 15%
original money 258,000
para icheck Kung Tama
86000 x 10%= 8600
172,000x 15%=25800
25800+8600=34400 tama
2. 8 1/3 liters
5 * 20% + x* 100%= (x+5) 70%
1+x=.7x + 3.5
x-.7x= 3.5-1
.3x/.3=2.5/.3
x=8.33 liters or 8 1/3 liters