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. The total distance covered by the car is:
(i) 100 km (ii) 25 km (iii) 15 km (iv) 10 km
6.
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First case:
40 km/h = _?_ m/s
= 40 * 5/18 = 11.11 m/s (approx)
15 min = _?_ sec
= 15 * 60 = 900 sec
Distance = Speed * Time
= 11.11 * 900 = 10000 m
Second case:
60 km/h = _?_ m/s
= 60 * 5/18 = 16.67 m/s (approx)
15 min = 900 sec
Distance = 16.67 * 900 = 15000 m
Total distance = 10000 + 15000 = 25000 m
1000 m = 1 km
⇒ Answer = 25 km
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