A motorboat can travel 30 km upstream and 28 km downstream in 7 hours. It can travel 21 km upstream and return in 5 hours. Find the speed of the boat in still water and the speed of the stream. A motorboat can travel 30 km upstream and 28 km downstream in 7 hours. It can travel 21 km upstream and return in 5 hours. Find the speed of the boat in still water and the speed of the stream. November 22, 2020 Category: Chapter 3 - Pair of Linear Equations in Two Variables , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related