A andB start from the same place in the same direction and at the same time with speeds km/hr and 2 m/sec recpectivly after 5 hour who will be ahade and by how much
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★Given:-
- A and B start from the same place in the same direction.
- Speed of A = 6km/hr
- Speed of B = 2 m/s
- Time = 5hours
★To find:-
- Who will be ahead and by how much.
★Solution:-
We can see that the units of speeds of A and B are different.So,we first have to convert the units to be the same to further solve the question.
Converting units:-
To convert m/sec into km/hr, multiply the number by 18 and then divide it by 5.That is,
➺Speed of B = 2m/s
➺2 × (18/5)
➺7.2kmph
Using the formula,
✦Distance = speed×time
Distance covered by A:-
➺Distance = speed×time
➺Distance = 6×5 = 30
∴Distance covered by A = 30km
Distance covered by B:-
➺Distance = speed×time
➺Distance = 7.2 × 5 = 36km
∴Distance covered by B is 36km
As we can see,B covered more distance than A.Hence B is ahead of A by,
➺36 - 30
➺6 km
Hence,B is ahead of A by 6km
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