recently, i decided to walk down an escalator of a tube station. i did some quick calculation in my mind. i found that if i walk down 20 ` ` 6 steps, i require thirty seconds to reach the bottom. however, if i am able to step down thirty ` ` 4 stairs, i would only require eighteen seconds to get to the bottom. if the time is measured from the moment the top step begins to descend to the time i step off the last step at the bottom?	Choose the correct choice from the following choices.
A) 43
B) 44
C) 45
D) 40
E) 46
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">30 + 4</gadget>
<output>34</output>

<gadget id="calculator">20 + 6</gadget>
<output>26</output>

<gadget id="calculator">34 - 26</gadget>
<output>8</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">30 - 18</gadget>
<output>12</output>

<gadget id="calculator">8 / 12</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) * 18</gadget>
<output>12</output>

<gadget id="calculator">34 + 12</gadget>
<output>46</output>

<result>E</result>
recently, i decided to walk down an escalator of a tube station. i did some quick calculation in my mind. i found that if i walk down 20 ` ` 6 steps, i require thirty seconds to reach the bottom. however, if i am able to step down thirty ` ` 4 stairs, i would only require eighteen seconds to get to the bottom. if the time is measured from the moment the top step begins to descend to the time i step off the last step at the bottom?
add(add(multiply(const_3, const_10), 4), multiply(divide(subtract(add(multiply(const_3, const_10), 4), add(20, 6)), subtract(multiply(const_3, const_10), multiply(6, const_3))), multiply(6, const_3)))
26 steps 30 seconds and for 34 steps only 18 seconds left to reach botto . means he covered 8 steps ( i . e . 34 - 26 ) in 12 ( i . e 30 - 18 ) seconds the spped of the boy is 8 steps in 12 seconds after further simplyfy . . 2 steps in 3 seconds after 34 steps only 18 seconds , means 12 more steps are left total steps are 34 + 12 = 46 answer : e