Question

suppose M varies jointly as S and A . if S is triples and A doubled, what happens to M ?

Answer 1

M varies jointly as S and A means M = kSA

Answer 2

\[
M_i = kSA \\
M_f = k\cdot 3S \cdot 2A
M_f / M_i = \frac{ k\cdot 3S \cdot 2A}{kSA}
\]You want to find M_f/M_i

Answer 3

\[ M_i = kSA \\
M_f = k\cdot 3S \cdot 2A \\
M_f / M_i = \frac{ k\cdot 3S \cdot 2A}{kSA} \]

Answer 4

3*2= 6 times
and that too wio has gievn clear explanation and working