Answer:
Chronological ageC=40
Step-by-step explanation:
The IQ= Q varies directly as a persons metal age M and inversely as the person's chronological age C.
Mathematically it is written as Q=kM/C
Where M= mental age and C = chronological age
Q= 104.104= 13k/20
Cross multiply
104.1 ×20 = 13k
2080.2 = 13k
K= 2080/13
K=160
Rewriting the equation to : Q= 160M/C
Q=160×25/C
100=4000/C
Cross multiply
100C=4000
C= 4000/100
C= 40
