Question

A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes .What is the total distance covered by the car in these 30 minutes.

Answer 1

Answer:

For the first part of journey,

Speed=40km/h and time=15min=1/4 hour

Using ,speed=distance/time

Distance=40 x 1/4=10km

For the second part of journey,

Speed=60km/h and time=15 min=1/4 hour

Then distance=60 x 1/4=15 km

Total distance travelled in whole journey=10+15=25 km

Explanation:

Answer 2

the car covered 25 kilometer in these 30 minutes

Explanation:

• d of first 15 min = 40 km ×1/4 = 10 km
• d of second 15 min = 60 km × 1/4 = 15 km
• total distance = 25 km