Question

Arrange the following speeds in increasing order :

(i) Bicycle moving with a speed of 18 km/h ?
(ii) A fast runner running with a speed of 7 m/s ?
(iii) A car moving with a speed of 2000 m/min ?

Answer 1

Answer:

Explanation: a = 18 km/hr = 18000 metre/60 min. c = 2000m/seconds = 2 kilometers/minutes. b = 7 metre/seconds = 7 metre in 1 second = 7× 60 × 60 = 25200 metre/ minute.

Answer 2

Find⇝

(i) Bicycle moving with a speed of 18 km/h ?

(ii) A fast runner running with a speed of 7 m/s ?

(iii) A car moving with a speed of 2000 m/min ?

Solution⇝

$\sf \red{(i)}\: Speed \: of \: bicycle = \frac{18km}{h}$

$\implies \sf \: \frac{ \cancel{18} \times 5}{ \cancel{18}} = 5 \: m/s$

$\sf \red{(ii)} \: Speed \: of \: the \: runner \: running = 7m/s$

$\implies\sf\: 7×1000=7000 \: m/s$

$\sf \red{(iii)} \: Speed \: of \: car \: moving = 2000 \: m/min$

$\implies\sf \frac{ \cancel{200} \cancel0}{ \cancel6 \cancel0} = 33.3 \: m/s$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \sf \pink{⇝}(i) \: 5 \: m/s \: < (iii) \: 33.3 \: m/s < (ii) \: 7000 \: m/s$