Kathy is twice as old as Kelly who is 5 yrs younger
than Joshua. Four years ago Kathy was thrice as old
as Kelly. How old is Joshua?
A) 10
B) 11
C) 3
D) 13
ans,is 13 need solution plz dont give irrevalent ans
Answers
Answered by
0
Answer:
Its D
Step-by-step explanation
Lets
Kathy = a, Kelly = e and Joshua = j
Now(present):
a = 2 e and e = j - 5
a = 2(j - 5) = a = 2j - 10
4yrs ago(past):
a - 4 = 3 (e - 4)
for Joshua e - 4 = j - 5 - 4 = j - 9
replace e - 4 with j - 9
a - 4 = 3 (j - 9)
a = 3j - 27 +4 = 3j -23
Compare a = 2j-10 and a = 3j -23
3j - 23 = 2j - 10
3j-2j = 23-10
j = 13
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