What is the height of the concrete tank used in biogas plant?
A. 10-15 metres
B. 15-20 metres
C. 10-15 feet
D. 15-20 feet
Answer:C
What is the height of the concrete tank used in biogas plant?
A. 10-15 metres B. 15-20 metres C. 10-15 feet D. 15-20 feet