a boy runs for 20 minutes at a uniform speed of 18 kilometre per hour at what speed should he run for the next 40 minutes so that the average speed come 24 kilometre per hour
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If average speed we have to take out follow this step
1.8 km/hr is 18km/60 min which is 3 km/10 min.
In 20 min a distance of 6 km is covered.
24 km/hr is 24 km/60 min which is 4 km/10 min.
In 40 min a distance of 16 km is covered.
Total distance covered is 6+16 =22 km.
Total time is 20+40 = 60 min = 1 hr.
Average speed is thus 22 km/1 hr = 22 km/ hr.
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1.8 km/hr is 18km/60 min which is 3 km/10 min.
In 20 min a distance of 6 km is covered.
24 km/hr is 24 km/60 min which is 4 km/10 min.
In 40 min a distance of 16 km is covered.
Total distance covered is 6+16 =22 km.
Total time is 20+40 = 60 min = 1 hr.
Average speed is thus 22 km/1 hr = 22 km/ hr.
I hope it will help u
N if help n u like it then plz brainliest
Thank you...
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