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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



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


Grade:11

1 Answers

Radhika Batra
247 Points
7 years ago

(ii) 25 km

Case I

Speed of the car = 40 km/h

Time taken = 15 min =15/60= 0.25h 

169_88598_Image 1.jpg

Distance covered, d1 = Speed × Time taken = 40 × 0.25 = 10 km

Case II

Speed of the car = 60 km/h

Time taken = 15 min =15/60= 0.25h 

464_88598_Image 1.jpg

Distance covered, d2 = Speed × Time taken = 60 × 0.25 = 15 km

Total distance covered by the car, d1 + d2 = 10 + 15 = 25 km

Therefore, the total distance covered by the car is 25 km.

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