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Question

Question 19

Distance between Bholu’s and Golu’s house is 9 km. Bholu has to attend Golu’s birthday party at 7 o’clock. He started from his home at 6 o’clock on his bicycle and covered a distance of 6 km in 40 minutes. At that point he met Chintu and he spoke to him for 5 minutes and reached Golu’s birthday party at 7 o’clock. With what speed did he cover the second part of the journey? Calculate his average speed for the entire journey.

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Solution

40 minutes=4060=23 hrs
Speed=distancetime=623=3×3=9 km/hr for the first 6 km.
Now distance travelled = 3 km
Time taken = 15 minutes = 1560=14 hrs.
Speed=distancetime=314=3×4=12 km/hr for rest of the journey.
Avg. speed = 91=9 km/hr


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