excluding stoppages, the average speed of a bus is 100 km / hr and including stoppages, the average speed of the bus is 40 km / hr. for how many minutes does the bus stop per hour?	Choose the most appropriate option
A) 15 min	B) 18 min	C) 16 min	D) 20 min	E) 36 min
<gadget id="calculator">1 * 60</gadget>
<output>60</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 60</gadget>
<output>24</output>

<gadget id="calculator">60 - 24</gadget>
<output>36</output>

<result>E</result>
excluding stoppages, the average speed of a bus is 100 km / hr and including stoppages, the average speed of the bus is 40 km / hr. for how many minutes does the bus stop per hour?
subtract(multiply(const_1, const_60), multiply(divide(40, 100), const_60))
in 1 hr , the bus covers 100 km without stoppages and 40 km with stoppages . stoppage time = time take to travel ( 100 - 40 ) km i . e 60 km at 100 km / hr . stoppage time = 60 / 100 hrs = 36 min answer : e