Question

A train usually makes its run in 2 hours 20 minutes at an average speed of 42 kmh-. How
long will it take, if the speed is reduced to 28 kmh-?
step by step......please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please give me my ans please help me.. ​

Answer 1

Answer:

It takes 280 m.

Step-by-step explanation:

The time taken to pass a man standing on the platform by a train 280 m long travelling at 42 kmph = 280m*60*60sec/42*1000 m

= 24 sec.

here,

The distance is the length of train itself. = 280m.

hope it helps u..l

Answer 2

${ \huge{ \pink{ \underline{ \underline{ \red{ \mathbb{ \bigstar{ \purple{answer}}}}}}}}} \\ \bf \: let \: the \: distance \: be \: x \\ speed = \frac{distance}{time} = \frac{x}{ \frac{10}{2} } = \frac{2x}{10} = 42 \\ 2x = \frac{10 \times 42}{2} \\ x = 210km \: \\ time = \frac{distance}{speed} \\ \:$

210/28 =15/14 hours .