Question

An object covers 220 km of distance in the first 5 hours and then another 280 km of distance in the next 5 hours. The average speed of the object in meter per second will be-
a) 10.66 m/s
b) 13.9 m/s
c) 15.6 m/s
d) 20.4 m/s​

Answer 1

Given

• The first distance covered = 220 km
• Time taken to cover first distance =5 hrs
• Second distance covered = 280 km
• Time taken to cover second distance= 5 hrs

As we know

For average speed we have

Vav: = total distance covered / total time taken

= 220+280 / 5+5

= 500/10

Average speed = 50 km/hr

Or

Average speed = 13.88 m/s = 13.9 m/s

• Option b is correct

Hope it helps

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