A train travels from city A to city B with a constant speed of 10 ms−1 and returns back to city A with a constant speed of 20s−1. Find its average speed during its entire journey. A train travels from city A to city B with a constant speed of 10 ms−1 and returns back to city A with a constant speed of 20s−1. Find its average speed during its entire journey. August 27, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related