Vijay goes to school by school. The car and it takes 30 mins to reach his oplometer of the car shows that it has typcelled a 30km distance Calculate the speed of the car.
Answers
Answer:
Let us assume that Abdul is travelling x kilometer distance while going to school.
Distance = Speed x Time
1)When it's average speed is 20 km/hr
x=v
1
×t
1
=20×t
1
2)When it's average speed is 30 km/hr
x=v
2
×t
2
=30×t
2
V
average
=
totaltimetaken
totaldistancetravelled
V
average
=
v
1
x
+
v
2
x
x+x
=
20
x
+
30
x
2x
=24 km h
−1
Explanation:
Answer:
Explanation:
Let the distance traveled by Abdul from home to school = s km
time taken to reach the school-t1 sec
For Return journey, Abdul cover distance s km
time=t2 sec
:: Average speed for forward journey[home - school ] = Total distance/
Total time.
20 km/h =s/t1
..t1=s/20 h ------eq(1)
Average speed for backward journey[school -home] = Total distance/
Total time.
30 km/h s/t2
t2=s/30h -----eq(2)
Average distance for entire journey =
Total distance/ Total time
20 +s/30]
s[1/20+1/30]
=2x20x30/50
km/hr
=(s+s)/[s/
=2s/
Vol 67
= 24