Alvin paddled for 44 hours with a 33-km/h current to reach a campsite. The return trip against the same current took 77 hours. Find the speed of the boat in still water.

121km/h

Explanation:

Let speed of boat=xkm/h

Speed of water flow=33 km/h

Speed upstream=(x-33)km/h

Speed downstream=(x+33)km/h

Time=44 hrs

Time =77 hrs

We have to find the speed of boat.

Using the formula

Upstream distance=Downstream distance

Hence, the speed of boat=121km/h

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by