Question

a bus is moving at a constant rate of 40 kilometre per hour for two heart and then at a constant rate of 50 kilometre per hour for two more heart what is its average speed​

Answer 1

Answer:

$\huge\red Answer$

Speed of car in first 15 minutes = 40 km/h

Distance covered = speed × Time taken

60 minutes = 1 hour

15 minutes =

60

15

hour

Distance covered = 240×

60

15

=10km

Speed of car in next 15 minutes = 60 km/h

Distance covered = 60×

60

15

=15km

∴ Total distance covered = (10+15)km = 25 km

∴ 25 km is correct

Answer 2

Answer:

90 km

Explanation: