Posted by joi on Tuesday, December 27, 2011 at 11:22am.
1. Three boxes A, B and C weigh 12kg altogether. Box A weighs 1.2kg more than B and 0.3kg more than C. What is the weight of the heaviest box?
2. Peter and Ali have 375 cards altogether. If Ali gives 25% of his cards to Peter, he will have 1/4 as many cards as Peter. How many cards does Ali have?
- maths p5 - Steve, Tuesday, December 27, 2011 at 3:40pm
A = B + 1.2
A = C + .3
C = B + .9
A+B+C = B+1.2 + B + B+.9 = 12.0
3B + 2.1 = 12.0
B = 3.3
A = 4.5
C = 4.2
If p a gives 1/4 of his cards to p,
3/4 a = 1/4(p + a/4)
3a = p + a/4
12a = 4p + a
11a = 4p
a + p = a + 11/4 a = 375
15a/4 = 375
15a = 1500
a = 100
so, p = 275
if a gives 25 to p,
then a = 75 and p = 300
Answer this Question
More Related Questions
- maths - the weight of 4 boxes together is 66.5kg.the weight of box B is 2kg less...
- algebra - A shipping clerk wishes to determine the weights of each of the 4 ...
- physics - TWO BOXES A AND B ARE LYING ON THE TABLE AND ARE CONNECTED BY A PIECE ...
- Science last question - Which of the following boxes would have the strongest ...
- Math - A mail truck picks up two boxes of mail from the post office. The total ...
- Algebra - A moving Company weighs 20 boxes you have packed that contain either ...
- Math/ Science - If you squeezed all the air in a large living room into a small...
- math - Four boxes of cereal are to be selected at random from a continuous ...
- math - A shipment of boxes weighs 40 pounds. There are 8 boxes and each weighs ...
- math - Flora’s class collected 236 books. They are placing the books in boxes. ...