Question

A train is moving at a uniform speed of
80 km per hour. The time required to cover
a distance of 400 km

Answer 1

Speed=distance/time

80= 400/t

time = 400/80

time is 5 hours

Answer 2

Given :

• A train is moving at a uniform speed of
• 80 km per hour.

To find :

• Time required to cover a distance of 400 km

Formula used :

$t= \dfrac{d}{S}$

where :-

• S = speed
• d = distance
• t = time

Solution :

To find time taken to cover 400 km we will use the given formula :-

$\implies t= \dfrac{d}{S}$

put :-

• d = 400 km
• s = 80

$\implies t= \dfrac{400}{80}$

$\implies t= \dfrac{40}{8}$

$\implies t= \dfrac{5}{1}$

$\implies t= 5 \: h$

Answer :

Time required to cover a distance of 400 km = 5 hours

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$\implies \: S = \dfrac{d}{t}$

$\implies \: {d} = {t} \times S$

$\implies t= \dfrac{d}{S}$

where :

• S = speed
• d = distance
• t = time

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