If Q=(p+q+r)/2 & (Q-p):(Q-q):(Q-r)=17:5:8
then p:q:r=?
Answers
Answer: 13 : 25 : 22
Step-by-step explanation:
consider
-----> (Q - p) = 17
(p+q+r)/(2) -p = 17 since ((p+q+r)/(2))
p+q+r-2p = 34
-p+q+r = 34 --------------------(1)
------> (Q-q) = 5
(p+q+r)/(2) -q = 5
p+q+r-2q = 10
p-q+r = 10 ---------------------(2)
------->(Q-r) = 8
(p+q+r)/(2) -r = 8
p+q+r -2r = 16
p+q-r = 16 ---------------------(3)
solve 1 & 2
-p+q+r = 34
p-q+r = 10 (cancel -p +p and +q -q)
-----------------------------------
2r = 44
r = 22 ------> we got " r " value
-----------------------------------
solve 2 & 3
p-q+r = 10
p+q-r = 16 (cancel -q +q and+r -r)
----------------------------------
2p = 26
p = 13 -------> we got " p " value
-----------------------------------
solve 1 & 3
-p+q+r = 34
p+q-r = 16 (cancel -p +p and +r -r)
-----------------------------------
2q = 50
q = 25 -------> we got " q" value
-----------------------------------
hence p:q:r = 13:25:22
short cut :- IN THE QUESTION THEY ARE PROVIDED
17:5:8
consider p=17,q=5,r=8
p= 5+8 = 13, q= 17+8 = 25, r= 17+5 = 22
p:q:r = 13:25:22