A motorcycle is moving at the speed of 25 km/hour and its speed is increased by 7 km/hour at the end of each hour. How much time it will take to cover a distance of 225 km?
Answers
Answer:
A motorcycle is moving at the speed of 25 km/hr and its speed is increased by 7 km/hr at the end of each hour. How much time it will take to cover a distance of 225 km? Distance travelled in every hour will be equal to the speed. Hence, 30 km can be travelled in 0.5 hours.
Explanation:
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Answer:
11/2 hrs.
Explanation:
GIVEN:
Initial speed = 25 km/hour
Total distance = 225 km
Distance travelled in 1st hour ate speed of 25 km/hour = 25 km
Due to increase in speed by 7 km/hour at the end of each hour
Distance travelled in 2nd hour = 25 + 7 = 32 km
Similarly, in 3rd 4th and 5th hour distance will be = 39, 46 and 53 km
So distance travelled by him till now in 5 hours = 195 km
Remaining distance = 225 – 195 = 30 km
Speed in next hour will be 53 + 7 = 60 km/hour
To travel left 30 km at speed of 60 km/hour, time taken = 30/60 = 30 minutes
∴ 225 km will be travelled in = 5 hours + 30 minute = 11/2 hours