The Chart shows men and women's average daily earning in company X. The difference between the average daily earning between men and women over the successive year is :
A) equal
B) decreasing
C) increasing
D) both, increasing and decreasing in different years
A) equal
B) decreasing
C) increasing
D) both, increasing and decreasing in different years
From the top of a building, the angles of elevation and depression of top and bottom of a tower are 60 deg and 30 deg respectively. If the height of the building is 5m, then the height of the tower is