Ift varies as v, and t = 24 when v=t, find v when t = 21.

V = 21

Step-by-step explanation:

from the question, which says if T varies as V and T = 25 and V=T. find V when t = 21.

solution.

T∝ v

T = KV where K is the constant of proportionality

make K the subject of the formulae

then

K = T/V

Note, T = V from the question and T was given to be 24

therefore;

K = 24/24

K = 1

so, find V when T = 21

from K = T/V

k = 21 / v

1 = 21 / v

we cross multiply inorther to get the value for v

1 * v = 1 * 21

V = 21 ... solved