Question

Convert the following speeds into km/hour.
(i) 18 m/sec (ii) 25 m/sec (iiih 30 m
avalist has a speed of 12 km/hour​

Answer 1

Answer:

$\frac{1 \: meter}{1 \: sec} = \frac{ \frac{1km}{1000} }{ \frac{1 \: hour}{60 \times 60} } \\ = \frac{60 \times 60}{1000} km \: h \\ = \frac{18}{5} \frac{km}{h}$

1m/s = 18 /5 km/h

(1)

18m/s = 18 × 18/5 km/h

=64.8 km/h

(2)

25m/s = 25 × 18/5 km/h

= 90 km/h

(3)

30 m/s = 30 × 18/5 km/h

= 108 km/h

AND SO ON...