Question

an object travels with a speed of with with the speed of 72 metre per second if it has to travel 50 kilometre find the time taken in hours?​

Answer 1

$\sf{speed \: of \: object = 72 {ms}^{ - } }$

$\sf{distance \: travelled = 50km = 5000m}$

$\: \: \: \: \: \: \: \: \: \green{ \boxed{ \sf \red{speed \: = \frac{distance}{time} }}}$

$: ⟹\: \ \: \: \sf{72 = \frac{5000}{time}}$

$\: \: \: : ⟹ \sf {\: \: time = \frac{5000}{72} }$

$\: \: \: \: \: \: : ⟹\sf{time = 69.44 \: second}$

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Answer 2

Your answer:

72 metres: 1 second

1 metre: 1/72

50000 metres (50 km): 1/72 x 50000

                                     = 694.444444 [to be precise]

                                     => Can also be written as 694.44 seconds

Now 694.44 seconds to be converted to hours:

=> 0.1929 hours

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