Henrikh lives x blocks from his office. It takes him 1 minute per block to walk to
work and 20 seconds per block to ride his bicycle to work. If it takes him exactly
16 minutes more to walk to work than to ride his bicycle, then x equals Choose the correct answer:
A) 4	B) 7	C) 10	D) 15	E) 24
The best way would be...   Per km, he takes 40 secs extra if he walks   So he will take 16 mins or 16*60 secs in 16*60/40= 
<gadget id="calculator">16*60/40</gadget>
<output>24</output>
24 km   ANSW24R:24
<result>E</result>
Henrikh lives x blocks from his office. It takes him 1 minute per block to walk to
work and 20 seconds per block to ride his bicycle to work. If it takes him exactly
16 minutes more to walk to work than to ride his bicycle, then x equals