P‚Äö√á√áO‚Äö√á√ñ content in triple superphosphate is about __________ percent.#

P‚Äö√á√áO‚Äö√á√ñ content in triple superphosphate

1.	P‚Äö√á√áO‚Äö√á√ñ content in triple superphosphate is about __________ percent.#
A.	42-50
B.	15-20
C.	85-90
D.	70-75
Answer» B. 15-20