Answer:
b c d
Step-by-step explanation:
Answer:
63 m
Step-by-step explanation:
We are given the following in the question:
Average speed of swimming = 45 m/min
Time = 1 minute 24 seconds
Converting time into minutes:

Formula:

Putting values, we get.

Thus, Alex swims for 63 m in 1 minute and 24 seconds.
I think so that the answer is -48828125
Density = mass / volume
density = 20/5 = 4 g/cm^3