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adelina 88 [10]
3 years ago
7

Robert can swim the first 50 meters of a race in 1 minute. Then he slows down by 12 seconds for each of the next 50 meters of a

race. How long will it take Robert to swim a 400 meter race?
Mathematics
1 answer:
yaroslaw [1]3 years ago
5 0
Since you already know that the first 50 meters took 1min you can subtract
400meters-50meters=350meters
350meters÷50meters=7minutes
It increases at 12 sec./min for 7mins
1.12,1.24,1.36,1.48,2.00,2.12,2.24= 11.56+1.00=12.56min
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