Question

A Bus travels first half distance between two places with a speed of 40 kmph and the rest half distance with a speed of 60 kmph. The average speed of the Bus is ?
A) 48 kmph
B) 50 kmph
C) 46 kmph
D) 42 kmph

Answer 1

A Bus travels first half distance between two places with a speed of 40 kmph and the rest half distance with a speed of 60 kmph. The average speed of the Bus is ?
A) 48 kmph✅✅✅
B) 50 kmph
C) 46 kmph
D) 42 kmph

Answer 2

:
let a = average speed for the trip
let d = half the distance
:
write a time equation, time = dist/speed
 +  = 
we don't need d, divide thru by d and you have
 +  = 
multiply by 120a to clear the denominators, results:
3a + 2a = 120(2)
5a = 240
a = 240/5
a = 48 km/hr
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