After a car A started travelling at a speed of 90 km/h, half-hour later from the same place in the same direction starts car B travelling at 120km/h. When will car B reach the car A?
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Answered by
0
Answer:
After 1½ hour
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Answered by
2
Answer:
Concept Used:
If the distance is constant then, the time taken will be inversely proportional to the speed.
Calculation:
Ratio of Speed = 90 120 3:4
:: Distance traveled is constant, the ratio of Time taken will be 4:3.
We can say that the total time taken is 7 unit.
According to the question,
The total time taken is 7 hours.
7 unit 7 hours
→ 4 unit → → (7 × 4)/7 = 4
→ 3 unit (7 x 3)/7 = 3
Time taken while going is 4 hours and returning is 3 hours.
Distance travelled = 90 x 4 = 360 km.
:: Distance travelled is 360 km.
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