A certain number of horses and an equal number of men are going somewhere. Half of the owners are on their horses' back while the remaining ones are walking along leading their horses. If the number of legs walking on the ground is 90, how many horses are there ? Choose the correct answer:
A) 10	B) 12	C) 14	D) 16	E) 18
legs 18*4= 
<gadget id="calculator">18*4</gadget>
<output>72</output>
72   now half on their horses so remaining on the walk so 9 men   9 men has 18 legs   so, 18+ 72= 90 legs walking   ANSW18R:18
<result>E</result>
A certain number of horses and an equal number of men are going somewhere. Half of the owners are on their horses' back while the remaining ones are walking along leading their horses. If the number of legs walking on the ground is 90, how many horses are there ?