Nakul starts his journey to his school at 9:00 a.m. and reaches his school at 1 p.m. if it drives the scooter at speed of 30 km per hour by how much should he increase the speed of the scooter so that he can reach the school by 12 noon
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Answer:
10 km/h
Step-by-step explanation:
Total time taken by Nakul= 4 hrs
total speed = 30Km/h
so , distance covered=. speed x time
= 30 x 4 = 120 km
Now, to decrease the time to 3 hrs
speed = distance/ time = 120 km/ 3 hr
=40 km/h
so he should increase his speed by =40-30 = 10 km/h
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