sum of Rs.7700 is to be dividedamong three brothers Zain, Zaid and Zoaib in such a way that simple intereston each part at 5% per annum after 1,2 and 3 years, respectively remains equal. The share of Zain is more than that of Zoaib by?

Answer 1

let the parts be
x, y, and 7700-x-y

interest on x for 1 year = 1(.05)x
interest on y for 2 years = 2(.05)y = .1y
interest on 7700-x-y = 3(.05)(7700 - x - y)
as I read the question, these are all the same

.05x = .1y
x = 2y

.05x = .15(7700-x-xy)
x = 3(7700 - x - y)
x = 23100 - 3x - 3y
subbing in x = 2y

2y = 23100 - 6y - 3y
11y = 23100
y = 2100
then x = 2y = 4200
the third part = 7700-2100-4200 = 1400

carry on

Answer 2

Its wrong dear

Answer 3

yeah its wrong

Answer 4

it is right
4200-1400=2800 which is answer