Xavier starts from P towards Q at a speed of 90 kmph and after every 12 mins increases his speed by 20 kmph. If the distance between P and Q is 61km, then how much time does he take to cover the distance? Choose the correct choice from the following answers.
A) 52  B) 48  C) 44  D) 40  E) 36
first 12min = 90 *12/60= 
<gadget id="calculator">90 *12/60</gadget>
<output>18</output>
18km   2nd 12min= 110*12/60= 
<gadget id="calculator">110*12/60</gadget>
<output>22</output>
22km   3rd 12 min= 130*12/60= 
<gadget id="calculator">130*12/60</gadget>
<output>26</output>
26 km   TOTAL time 12.3=36 min   36
<result>E</result>
Xavier starts from P towards Q at a speed of 90 kmph and after every 12 mins increases his speed by 20 kmph. If the distance between P and Q is 61km, then how much time does he take to cover the distance?