Car A is traveling at a velocity of 22.0 m/s, when car B zooms by at a constant velocity of 51.0 m/s. After a delayed reaction time of 1.90 s, car A begins to pursue car B with an acceleration of 6.00 m/s2. Including the reaction time, how long does it take for car A to catch up with car B?

Multiply the 3 dimensions, assuming it is a rectangular cuboid, to get the volume in cm³ divide mass by volume to get density in g/cm³

2.77 x 10^-3 its for plato user 

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.