a person travels from p to q a speed of 60 km / hr and returns by increasing his speed by 20 %. what is his average speed for both the trips? Select.
A) 33 B) 77 C) 48 D) 66 E) 21
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">60 * (6/5)</gadget>
<output>72</output>

<gadget id="calculator">72 + 60</gadget>
<output>132</output>

<gadget id="calculator">132 / 2</gadget>
<output>66</output>

<result>D</result>
a person travels from p to q a speed of 60 km / hr and returns by increasing his speed by 20 %. what is his average speed for both the trips?
divide(add(multiply(60, add(const_1, divide(20, const_100))), 60), const_2)
"speed on return trip = 120 % of 60 = 72 km / hr . average speed of trip = 60 + 72 / 2 = 132 / 2 = 66 km / hr answer : d"