Question

iii) A car moves with a speed of 40 km/hr for 15 min and then with a speed of
60 Km/hr for the next 15 minutes. Calculate the total distance covered by the
car.
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Answer 1

Answer:

25km

Explanation:

15min.=1/4 hr

In first 15min. Distance travelled = 40*1/4 = 10km

In next 15 min. = 60*1/4=15km

Total distance travelled =10+15=25km

Answer 2

$speed \times time = distance \\ therefore \: d1 = 40 \times \frac{1}{4 } \\ 10 \\ d2 = 60 \times \frac{1}{4} \\ = 15 \\ therefore \: d = 15 + 10 = 25$