Question

a.What is the SI unit ?
b.Why is it necessary to have a standard unit of measurement?
c.What are the SI units of length and time?

Answer 1

Answer:

Hey...❣✌

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Here's your answer...⏬⏬⬇️

Explanation:

1) The SI is also called the metric system of,it is use all around in the world.

2) We need standard unit for measurement to make our judgement more reliable and accurate. For proper dealing, measurement should be same for everybody. Thus there should be uniformity in measurement. For the sake of uniformity we need a common set of units of measurement, which are called standard units. 

3) SI unit of Length- METRE

SI unit of Time- SECOND

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Hope It Helps...☺

Answer 2

Answer:

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