Question

Q.10 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​

Answer 1

Answer:

Speed (s1) = 40km/h

Time (t1) = 15 mins = (15/60) hr

Distance d1 = (s1 × t1) = 40 × (15/60) = 10 km

Speed (s2) = 60 km/h

Time (t2) = 15 min = (15/60) hour

Distance (d2) = (s2 × t2) = 60 × (15/60) = 15 km

Total distance (d) = (d1 + d2) = 10 km + 15 km = 25 km

Answer 2

Explanation:

60 min = 1hr

15 min = 15/60 = 3/12 = 1/4hr

car moves 15min with the speed of 40km/h

means car can reach 40km in an hr.

1hr. = 40km

1/4hr = 1/4 × 40

= 10km

1hr = 60km

1/4hr = 1/4 × 60

= 15km.

Total distance covered by car is 10 + 15 = 25km.

Hope it is helpful!!