Question

Abdul while driving to school , completes the average for this trip to be 20km/h. on his return to along the same route average speed is 30km/h due to less traffic. what is the average speed for Abdul trip?

Answer 1

here is ur answer dude,
distance = s
time to reach = t1
time to return= t2
speed = distance/time taken
20 = s/t1
20*t1 = s
t1= s/20
on return
30=s/t2
t2=s/30
total time taken= t1+t2
s/20 +s/30 ( take L.C.M)
3s +2s/60 ( do cutting)
s/12
speed = distance /time
distance = s+s =2s, time=s/12
2s /s/12 = 24 km /hr ans
hope it helps u. plz refer image if any doubt.
if so mark me as brainliest and follow.

Answer 2

$\huge\mathfrak{\underline{\underline{Solution :-}}}$

Let the distance between Abdul's home and school be x.

Time taken by Abdul from home to school= $t_{1}$ = $\huge\sf\frac{x}{20}$ hr.

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Time taken by Abdul from school to home $t_{2}$= $\huge\sf\frac{x}{30}$

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★Total time, t = $t_{1}$ + $t_{2}$

= $\huge\sf\frac{x}{20}+$$\huge\sf\frac{x}{30}$

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$\huge\sf\frac{x}{12}$

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★Total Distance, s = x + x = 2x km.

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★Average speed = $\huge\sf\frac{s}{t}$

= $\huge\sf\frac{2x}{x/12}$

= $\huge\sf\frac{2x}{x}$ * 12

= 24 km/hr.