A cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled?

A cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled?

A. 4.5 hrs
B. 5 hrs
C. 6.5 hrs
D. 7.2 hrs

The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is___________?

The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is___________?

A. 17 kg
B. 20 kg
C. 26 kg
D. 31 kg
Let A, B, C represent their respective weights. Then, we have: A + B + C = (45 x 3) = 135 …. (i) A + B = (40 x 2) = 80 …. (ii) B + C = (43 x 2) = 86 ….(iii) Adding (ii) and (iii), we get: A + 2B + C = 166 …. (iv) Subtracting (i) from (iv), we get : B = 31. B’s weight = 31 kg

The decentralized city can be identified by______________?

The decentralized city can be identified by______________?

A. the shift of employment and service away from the inner city towards multiple centers in smaller towns and rural areas
B. the degendering of public space as women use local facilities more
C. gentrification the movement of middle-class people back into the inner city
D. all of the above

Wirth (1938) said that social relationships in the urban way of life were segmental because______________?

Wirth (1938) said that social relationships in the urban way of life were segmental because______________?

A. they were confined to particular areas of the city
B. people knew each other only through specific situational roles and not as whole rounded individuals
C. there were distinctive patterns of activity for each social class
D. they were based on face to face interaction with close friends and family

The ecological approach to urban sociology involved studying ?

The ecological approach to urban sociology involved studying ?

A. how social groups colonized different areas of the city and competed for resources
B. the forms of wildlife and natural habitats that could be found on the edges of the city
C. the way in which people organized collective protests about environmental issues
D. how men and women used the city’s public spaces differently