state gov DSSSB Junior Assistant, Steno and LDC Mock Test 2023 - 24 Quantitative Aptitude Speed Time and Distance Average Speed
A person completes his journey in 4 parts by travelling 40 km, 50 km, 60 km and 100 km with a speed of 20 km/h, 25 km/h, 15 km/h and 50 km/h respectively. Find the ratio of average speed to the average of all speeds with which he travelled during whole journey.
1
8 : 9
2
9 : 10
3
10 : 11
4
14 : 15