Question

1) give two examples each of modes of transport used on land ,water and air?
2) why can pace or a footsteps not be used as a standard unit of length?


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Answer 1

1. Examples of modes of transport used on land are buses, cars, and so on. Examples of modes of transport used on water are boats, ships, and so on. Examples of modes of transport used in air are qeroplanes, helicopters, and so on.
2. Standard unit of length is a fixed length all over the world, which does not vary with time, place and persons and is not affected by any natural phenomenon. A pace or a footstep cannot be used as a standard unit of length as it is not fixed in length and varies from person to person.

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Answer 2

Answer:

1} bike,car.

ship, submarine.

plane,jet.

2) pace or a footstep cannot be used as a standard unit of length because everyone's footstep or pase will be different, so the length will not be correct if they are measuring with the pace or foot step. so metre, centimetre - British measurements - are used for measuring length

unit of length= metre