Translate the situation into mathematical language. You need not actually solve the problem.A boat can run 13 kilometers per hour in still water. How long will it take the boat to go 20 kilometers upstream on a river flowing at a rate of 8 kilometers per hour?
A. Let t be the time, in hours, it will take the boat to go 20 kilometers upstream; 21t = 20
B. Let t be the time, in hours, it will take the boat to go 20 kilometers upstream; 20t = 21
C. Let t be the time, in hours, it will take the boat to go 20 kilometers upstream; 20t = 5
D. Let t be the time, in hours, it will take the boat to go 20 kilometers upstream; 5t = 20
Answer: D
Mathematics
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