Average number of constructions in City R = (number of constructed building + number of demolished building + number of redeveloped building )/3

Correct Option: B

Average number of constructions in City R = (number of constructed building + number of demolished building + number of redeveloped building )/3
Average number of constructions in City R = 150 + 225 + 250/3 = 625/3 = 208.33 Approximate 208 %

Required ratio = number of building demolished in City T / number of buildings redeveloped in city P

Correct Option: D

Required ratio = number of building demolished in City T / number of buildings redeveloped in city P
Required ratio = 175 : 300 = 7 : 12

Total constructions in City Q = constructed building + demolished building + redeveloped building
Total constructions in City T = constructed building + demolished building + redeveloped building

Correct Option: B

Total constructions in City Q = constructed building + demolished building + redeveloped building
Total constructions in City Q = 100 + 175 + 275 = 550
Total constructions in City T = constructed building + demolished building + redeveloped building
Total constructions in City T = 175 + 250 + 300 = 725
Their difference = 725 - 550 = 175

Total number of buildings constructed across the cities = 200 + 100 + 225 + 300
Total number of buildings redeveloped across the cities = 300 + 275 + 250

Correct Option: C

Total number of buildings constructed across the cities = 200 + 100 + 225 + 300 = 1100
Total number of buildings redeveloped across the cities = 300 + 275 + 250 = 1400
Required percentage = 1100 x 100 /1400 = 78.57% approx. 79%

Average number of building = number of building across the cities (P + Q + R + S + T )/5

Correct Option: B

Average number of building = number of building across the cities (P + Q + R + S + T )/5
Average number of building = 50 + 175 + 150 + 75 + 175/5 = 625/5 = 125