a train 400 m long can cross an electric pole in 10 sec and then find the speed of the train?
Select
A) 165 kmph
B) 144 kmph
C) 172 kmph
D) 175 kmph
E) 178 kmph
<gadget id="calculator">400 / 1_000</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">10 / 3_600</gadget>
<output>1/360 = around 0.002778</output>

<gadget id="calculator">(2/5) / (1/360)</gadget>
<output>144</output>

<result>B</result>
a train 400 m long can cross an electric pole in 10 sec and then find the speed of the train?
divide(divide(400, const_1000), divide(10, const_3600))
"length = speed * time speed = l / t s = 400 / 10 s = 40 m / sec speed = 40 * 18 / 5 ( to convert m / sec in to kmph multiply by 18 / 5 ) speed = 144 kmph answer : b"