Q1. Divide 64 into two parts so that the difference bettween 2/3 of one part and 1/4 of the other is equal to 28. What is the value of the larger part?
i hv did a little bit on tis qn... but i m stuck or isit i m wrong...
my working: let the larger no. be x.
let the smalelr no. be 64/x.
2/3x - 1/4(64/x) = 28
2/3x - 64/4x = 28
8x/12 - 192/12x = 28
i m stuck here...
Q2. A boy walks a certain distance at 9km/h. He finds that if he increases his speed by 1/3, he would have saved 4/3 hrs. Find the distance he walks.
for tis qn, i dun reli undertsand or know how 2 solve it... yarr...:|
In a class there are 4 more boys than girls. 1/3 of the girls and 7/11 of the boys take the train to school. If half of the class take the train, how many boys and girls are there in the class?
A motorist travels 115 km on an expressway at an average speed of 92km/h and another 45minutes on other roads. If the average speed for his whole journey is 80km/h, how far did he travel on the other roads?
A pool can be filled with water by a large pipe within 6 hours. A smaller pipe will take 9 hours to fill the pool. How long will it take to fill the pool if the two pipes operate together?
Find two consecutive numbers such that 4/7 of the larger exceeds 1/2 of the smaller by 5.
my answer: Let the bigger no. be x.
Let the smaller no. be y.
4/7x - 1/2y = 5
is my answer correct??