InterviewSolution
Saved Bookmarks
| 1. |
A bus travelled the first one-third distance at the speed of 10 km/h, the next one-third at 20 km/h and the leone-third at 60 km/h. The average speed of the bus is(A) 9 km/h(B) 16 km/hC 18 km/h(D) 48 km/h |
|
Answer» Let total distance be x It covered x/3 at 10x/3 at 20x/3 at 60 Times taken respectively are { d / t } x / 30x / 60x / 180 respectively total time = x/30 + x /60 + x/180= 10x / 180= x / 18 Average speed of bus (avg s )= total distance / total time avg s = x / {x/18}avg s = 18 km / h (C) is correct option 18 is right . uujhjjj |
|