find the number of persons in the group.A car covers first 100 km of h

1.	find the number of persons in the group.A car covers first 100 km of his journey at 50 km/h, next 50 km at 40 km/hJourney at 50 km/h, next 50 km at 40 km/h and last 75 kmFind the average speed of the whole journey.techool at
Answer» 100 km at the speed of 50 km/ph, time = 100/50 = 2 hr 50 km at the speed of 40 km/hr, time = 50/40 = 5/4 hr. 75 km in 5/4 hr. ER. RAVI KUMAR ROY. AVERAGE SPEED = Total distance travelled / Total time taken = ( 100 + 50 + 75 )/(2 + 5/4 + 5/4) = 225/(18/4) = (225 X 4)/18 = 50 km/hr the correct answer is C 50km hoga sayad kyuki tsquare = d/s

find the number of persons in the group.A car covers first 100 km of his journey at 50 km/h, next 50 km at 40 km/hJourney at 50 km/h, next 50 km at 40 km/h and last 75 kmFind the average speed of the whole journey.techool at

Answer»

100 km at the speed of 50 km/ph, time = 100/50 = 2 hr

50 km at the speed of 40 km/hr, time = 50/40 = 5/4 hr.

75 km in 5/4 hr.

ER. RAVI KUMAR ROY.

AVERAGE SPEED = Total distance travelled / Total time taken = ( 100 + 50 + 75 )/(2 + 5/4 + 5/4) = 225/(18/4) = (225 X 4)/18 = 50 km/hr

the correct answer is C

50km hoga sayad kyuki tsquare = d/s