Question

answer mathsss question​

Answer 1

Answer:

1) 36km/h

36*5/18 = 10m/s

2) 90km/h

90*5/18= 25m/s

Step-by-step explanation:

This is a simple trick

If anything is given in km/h and you want to convert it into m/s

multiply it from 5/18

and if you want to convert m/s into km/h, multiply by 18/5

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Answer 2

Answer:

the answer for the first part is

$10 {ms}^{- 1}$

for the second part is

$25 {ms}^{ - 1}$

Step-by-step explanation:

i)

1km= 1000m

1 hour = 60minutes

1minute = 60 seconds

therefore, 1 hour = 60×60 = 3600 seconds

Now,

$36 \frac{km}{h} = 36 \times \frac{1000}{3600} {ms}^{ - 1} \\ = 10 {ms}^{ - 1}$

ii)

$90 \frac{km}{h} = 90 \times \frac{1000}{3600} \\ = 25 {ms}^{ - 1}$

Trick:- to convert km/hr to m/s multiply by 5/18 and

to convert m/s to km/hr multiply by 18/5