It functions as insulation, to keep it warm
1 km * 1 hr/20 km = 0.05 hr
1 km * 1hr/30 km = 0.033 hr
2km total
(0.05 + 0.0333) = 0.08333 hr
2km/0.08333 hr = 24 km/hr
Answer:
a) Mat swum 100 meters.
b)after 4 length , Mat's displacement is zero.
Explanation:
As given, Mat and David are training for the swimming team , and Length of 1 side of the pool is 25 meter.
As swimming pool will be a cube or a cuboid , so it has only 4 sides.
a)
1 length = 23 meter
⇒4 length = 4×25 = 100 meter
So, Mat swam 100 meters.
b)
As after swam 4 lengths of the pool, Mat reaches to its initial position i.e Mat come back to its starting point.
As Displacement is always measures from the starting point.
So, after 4 length , Mat's displacement is zero.