Question

Meera covers a distance of 18 km at 9 km/hr, a distance of 24 km at 8 km/hr and a distance of 16 km at 4 km/hr. What is her average speed?

Answer 1

Step-by-step explanation:

total distance =18km+24km+16km=58km

time take to cover=18km=18/9=2hr

time taken to cover =24km=24/8=3hr

time taken to cover 16km=16/4=4hr

total time =2hr+3hr+4hr=9hr

$average \: speed = \frac{total \: distance}{total \: time}$

so

$\frac{58km}{9hr} = 6 \frac{4}{9} km |hr$

or 6.4km/hr

so this is the average speed

Answer 2

Answer:

Average speed is (6.4 km per hour)

Step-by-step explanation:

Total distance travelled = 18 + 24 + 16 = 58 km

Total time taken = 18/9 + 24/8 + 16/4 = 2 + 3 + 4 = 9 hours

Average speed = (Total distance travelled) / (Total time taken)

=> Average speed = 58 / 9 = 6.4 km per hour