Question

Meenu drive Sarkar for 1 1/2 hours with a constant speed of 66 kilometre per hour and then for another 45 minutes with a constant speed of 80 kilometre/ hour what was the average speed?

Answer 1

Answer:

For 1st destination

Speed = 66km/h

Time=3/2h

Distance =speed ×time

=66×3/2=99 km

For 2nd destination

Speed =80km/h

Time=45m=3/4h

Distance =speed × time =89×3/4=60km

Average speed = total distance /total time.

(99+60)/(3/2+3/4)

=159/(9/4)=(159×4)/9=636/9

70.67km/h