Question

A car travels at speed 50 km/ hr for 30 min , at 30 km/hr gor next 15 min and then 70 km/ hr gor next 45 min. what is the average speed of the car?​

Answer 1

Heya mate...

avg speed= total distance / total time

speed1= 50km , t1= 30min= 0.5hr

speed2= 30km , t2= 15min= 0.25hr

speed3= 70km , t3= 45min= 0.75hr

distance1= speed1* t1 = 25km

distance2= 7.5km

distance3= 52.5

total distance= d1+ d2+ d3 = 85km

and, total time= (0.5+0.25+0.75)hr = 1.50hr

thus, average speed= 85/ 1.50

= 56.66km/hr

hence, the average speed of the car is 56.66km/hr.

HOPE IT HELPS UH ❤️