Question

a train is moving at a uniform speed of 84 km/hr . how far it will travel in 15 minutes ​

Answer 1

Answer:

$speed(s) \: = \frac{distance(d)(in \: meters)}{time \: (t)(in \: seconds)} \\ \\ where \: speed = 84 \: km \: per \: hour \: = 84 \times \frac{5}{18} \\ = \frac{70}{3} metre \: per \: second \\ \\ time = 15 \: minutes = 15 \times 60 = 900 \: seconds \\ \\ s = \frac{d}{t} \\ \\ d = s \times d \\ \\ d = \frac{70}{3} \times 900 = 21000 \: metres$

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