SOLUTION:
Five years back the aga of a father was three times the age of his son. it will be twice after the 10years.Find thrir present age?
Two persons 27km apart,starting at the same ti
Algebra.Com
Question 435682:
Five years back the aga of a father was three times the age of his son. it will be twice after the 10years.Find thrir present age?
Two persons 27km apart,starting at the same time are together in 9hours if they walk in the same direction,but 3hours if they walk in opposite direction.Find out speed of each man?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Five years back the aga of a father was three times the age of his son. it will be twice after the 10years.Find their present age?
------------
Equations:
(f-5)= 3(s-5)
(f+10) = 2(s+10)
-----
Rearrange:
f = 3s-10
f = 2s+10
----
Equate:
3s-10 = 2s+10
s = 20 (son's age now)
--------------------------
Solve for "f":
f = 3s-10
f = 3*20-10 = 50 (father's age now)
==============================================
Two persons 27km apart,starting at the same time are together in 9hours if they walk in the same direction,but 3hours if they walk in opposite direction.Find out speed of each man?
----------------
Same Direction DATA:
Faster man: distance = d+27 km; time = 9 hrs; rate = (d+27)/9 km/h
Slower man: distance = d km ; time = 9 hrs; rate = d/9 km/h
-----------------
Opposite Direction DATA:
Faster man: rate = (d+27)/9 km/h ; time = 3 hrs ; distance = rt = (d+27)/3 km
Slower man: rate = d/9 km/h ; time = 3 hrs ; distance = rt = d/3 km
----
Equation:
dist + dist = 27 km
(d+27)/3 + d/3 = 27
---
d+27+d = 3*27
2d = 2*27
d = 27
--------------
Faster man rate = (d+27)/9 = (2*27)/9 = 18 km/h
Slower man rate = d/9 = 27/9 = 3 km/h
==========================================
Cheers,
Stan H.
RELATED QUESTIONS
seven years back the age of a father was 5 times the age of his son. It will be twice... (answered by josgarithmetic)
seven years back the age of father was 5 times of the age of his son. it will be twice... (answered by josgarithmetic)
Father' age was 7 times his son 5 years ago.
After five years, he will be 3 times his... (answered by richwmiller)
The age of a father is five times the age of his son. After 13 years, the father's age... (answered by vidya p)
two years ago , a father was five times old as his son . two years later from today his... (answered by ankor@dixie-net.com)
Three years back the age of a father was 24 years more than his son. At present the... (answered by ankor@dixie-net.com)
A FATHER IS 3 TIMES AS OLD AS HIS SON. AFTER 12 YEARS HIS AGE WILL BE TWICE AS THAT OF... (answered by JulietG)
Five years ago, the age of the father was thrice the age of his son. In five years time,... (answered by josmiceli)
after five year, the age of a father will be thrice the age of his son, whereas five... (answered by JulietG)