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roy is now 4 years older than erik and half of that amount older than iris. if in 2 years, roy wil be twiceas old as erik then in two years what would be roy's age multiplied by iris age
a)28
b)48
c)50
d)52
Read Solution (Total 6)
-
- At present
roy=erik+4....(1)
roy=iris+2....(2)
In 2yrs,
roy+2=2(erik+2)
(erik+4)+2=2(erik+2)....from(1)
erik=2yrs
so,roy=6yrs
iris=4yrs
after 2years
roy*iris=8*6=48 - 12 years agoHelpfull: Yes(130) No(9)
- At present
age of roy ... 6 yrs, age of erik = 2 yrs, age of iris = 4 yrs
after 2 yrs , age of roy = 8 yrs, age of iris = 6 yrs
After two years roy's age multiplied by iris age = 8*6= 48 yrs
- 12 years agoHelpfull: Yes(20) No(8)
- given that now roy is 4 years older that eric so
roy=4+eric -->1
and half of that older than iris
roy=2+iris -->2
in 2years roy is twice as old as erick
roy+2=2(eric+2)
roy=2eric+2
substitute in eq 1
2eric+2=4+eric
eric=2
roy=4+2=6
iris=roy-2= 6-2= 4
these are prresent ages of roy=6 eric=2 and iris=4
after 2 yeas roy=8 and iris=6
6*8=48
ans:b - 10 years agoHelpfull: Yes(6) No(2)
- exlaim properly
- 12 years agoHelpfull: Yes(5) No(4)
Roy is now 4 years older than Erik --> R=E+4
Roy is now ... half of that amount older than Iris --> R=I+frac{4}{2}=I+2 (half of the amount of 4)
In 2 years, Roy will be twice as old as Erik --> R+2=2(E+2) (in 2 years for both Roy and Eric)
Then in 2 years what would be Roy’s age multiplied by Iris’s age --> (R+2)(I+2)=?
Solving: R=6 and I=4 --> (R+2)(I+2)=48
Answer: C. - 9 years agoHelpfull: Yes(3) No(0)
- Let present age of Roy be x.
Eric is 4 yrs younger than Roy->x-4
Iris is 2 yrs younger than Roy->x-2
In 2 yrs( According to the problem)
x=2(x-4) ->x=8(Roy's age)
Iris age=6,Eric's age=4
Hence Iris age*Roy's age=6*8=48
- 8 years agoHelpfull: Yes(3) No(0)
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