The number of ways 6 persons can be seated at a round table facing inwards, if two arrangements are said to be indistinguishable when they are in the same clockwise order, is

Step-by-step explanation:

There are seats.

Possible number of arrangements =

Total number of possible rotations=

Hence possible distinguish arrangements=

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,