Question

T is directly proportional to M.

If T = 20 when M = 4, find:

a) T when M=3
b) M when T=10

Answer 1

a) T when M=3

T = 15

b) M when T=10

M = 2

Answer 2

By proportionality, for any number
`a`, if T is multiplied by
`a` then the same goes for M.

a) M has been multiplied by
`\frac{3}4` hence
`T=20\cdot\frac{3}4=5\cdot3=15`


`\boxed{T=15}`

b) T has been divided by
`2` hence
`M=\frac{4}2`


`\boxed{M=2}`