Question

a car moves with a speed of 40km/h for fifteen minutes then with a speed of 60km/h for the next 15 minutes .the total distance is:
100km
25km
15km
10km

Answer 1

Answer:

25

Explanation:

Speed for first 15 minutes = 40 kmph

Distance in first 15 minutes = $40*\frac{1}{4}  = 10$ km

Speed for next 15 minutes = 60 kmph

Distance in first 15 minutes = $60*\frac{1}{4}  = 15$ km

Hence, total distance travelled = 10+15 kms = 25kms