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09 Sep 2020, 04:52
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
80% (01:32) correct
20%
(01:27)
wrong
based on 45
sessions
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A certain chemical reaction requires 4/7 units of catalyst for every unit of chemical. How many students can perform an experiment if there are \(20\frac{4}{7}\) units of catalyst available in the lab, and only one unit of the chemical is required for each student?
A 33
B 34
C 36
D 38
E 40
A 33
B 34
C 36
D 38
E 40
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09 Sep 2020, 08:57
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For 1 unit of chemical = 4/7 units of catalyst is required.
total units of catalyst = 144/7.
=> 4/7 units of catalyst is needed by 1 student
=>1 unit of catalyst is needed by 7/4 students.
=> 144/4 units is needed by (7/4)*(144/7)
=> 144/4 = 36 students.
Answer is C.
total units of catalyst = 144/7.
=> 4/7 units of catalyst is needed by 1 student
=>1 unit of catalyst is needed by 7/4 students.
=> 144/4 units is needed by (7/4)*(144/7)
=> 144/4 = 36 students.
Answer is C.
