Question

(a) Why are cubit and footstep not used as standard units for measuring length?
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Answer 1

Answer:

Hand span and cubit are not used as standard units of length because their sizes vary from person to person. So, two different persons may give different measurements for the same length, which is not desirable for a standard unit.

Explanation:

hope this will help you

Answer 2

ᴀ ᴘᴀᴄᴇ ᴏʀ ᴀ ғᴏᴏᴛsᴛᴇᴘ ᴄᴀɴɴᴏᴛ ʙᴇ ᴜsᴇᴅ ᴀs ᴀ sᴛᴀɴᴅᴀʀᴅ ᴜɴɪᴛ ᴏғ ʟᴇɴɢᴛʜ ʙᴇᴄᴀᴜsᴇ ᴛʜᴇ ʟᴇɴɢᴛʜ ᴏғ ғᴏᴏᴛsᴛᴇᴘ, ғᴏʀᴇᴀʀᴍ ʟᴇɴɢᴛʜ ᴀɴᴅ ʜᴀɴᴅ sᴘᴀɴ ᴏғ ᴅɪғғᴇʀᴇɴᴛ ᴘᴇʀsᴏɴ ɪs ᴅɪғғᴇʀᴇɴᴛ. ... sᴏ ғᴏᴏᴛsᴛᴇᴘs ᴀɴᴅ ᴏᴛʜᴇʀ sᴜᴄʜ ᴍᴇᴀsᴜʀɪɴɢ sʏsᴛᴇᴍs ᴄᴀɴɴᴏᴛ ʙᴇ ᴜsᴇ ᴀs sᴛᴀɴᴅᴀʀᴅ ᴜɴɪᴛ.

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