Answer:
Explanation:
Make a ratio
7 : 1
7/4:x
Cross multiple
7x = 7/4
Then make x a subject formula
x =1/4
1/4
since 7 tonnes can be shredded per day you need o divide the amount you have by 7
so 7/4 /7 = 1/4
so it will take 1/4 days
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