Question

convert the following to km/h
(i) 20 m/s
(ii)2.5 m/s
(iii)1.25 m/s

Answer 1

(I)
$20 \times 3.6 = 72km \: upon \: sec$
(ii)
$2.5 \times 3.6 = 9 \: km \: upon \: sec$
(iii)
$1.25 \times 3.6 = 4.5 \: km \: upon \: sec$

Answer 2

multiply each one by18/5
ex.i) 20×18/5= 72km/hr
youcan do others also like this..
this may help u