4
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. The total distance covered by the car is
(a) 100 km
(b) 25 km
(c) 15 km
(d) 10 km
(a) 100 km
(b) 25 km
(c) 15 km
(d) 10 km
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Solution
(a) 100 km
Distance covered by car for first 15 mins = d1 = 40 km/h
Distance covered by car for next 15 mins = d2 = 60 km/h
Total distance travelled by car = d1 + d2
= 40 km/h + 60 km/h
= 100 km/h
Distance covered by car for first 15 mins = d1 = 40 km/h
Distance covered by car for next 15 mins = d2 = 60 km/h
Total distance travelled by car = d1 + d2
= 40 km/h + 60 km/h
= 100 km/h
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