Question

You drive to the store at 20 kmph and return by the same route at 30 kmph. Discounting the time spent at the store, what was your average speed ?

Answer 1

$\huge{Hey Mate!!!}$

☆☞ Here is ur answer ☜☆

✔✔ Average speed=total distance/total time

Let distance to store be  K

then, total time =(K/20)+(K/30)=K/12
and, total time =(2K)

so average speed= 2K / (K/12) = 24kmph.

HOPE IT HELPS!

Answer 2

LeT ,,

D = way distance

2D = Round Trip

Time there + time back = time there & back

D/20+ D/30= 2D/a

multiply equation by 60a, results

3da + 2da = 60(2d)-------(1)
3da + 2da = 120d--------(2)

From 1 and 2

we Get ,,,

3a + 2a = 120

5a = 120

a = 120/5

a = 24 mph is the average speed


If It's True ,,


Find the times if d = 60 mi

60/20 + 60/30 = 120/24

3 + 2 = 5 

thanks me Later ❤️