If A varies directly proportional to C and B also varies directly pro…

Question

If A varies directly proportional to C and B also varies directly proportional to C, which one of the following is not correct ?

Accepted Answer

Option B. ( A - B ) \,1/C. Answer & Solution Answer: Option B Solution: & A C and B C & A = kC and B = mC & for some constants k and m . & A + B = kC + mC = ( k + m ) C & ( A + B ) C. & A - B = kC - mC = ( k - m ) C & ( A - B ) C. & AB = kC × mC & \,\,\,\,\,\,\,\,\,\,\,\,\,\, = km C^2 & \,\,\,\,\,\,\,\,\,…