Question 53
During a journey a person travels half of the distance at a speed of 18 km/h and the remaining half of the journey at a speed of 22 km/h. What is his average speed for the entire journey?
Solution
average speed for the entire journey = $$\frac{2\times\ Speed_1\times\ Speed_2}{Speed_1+Speed_2}$$
= $$\frac{2\times18\times\ 22}{18+22}$$
= $$\frac{2\times18\times\ 22}{40}$$
= $$\frac{9\times\ 22}{10}$$
= $$\frac{198}{10}$$
= 19.8 km/h
Create a FREE account and get:
- Free SSC Study Material - 18000 Questions
- 230+ SSC previous papers with solutions PDF
- 100+ SSC Online Tests for Free
