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Answer:
98.684 tonnes
Step-by-step explanation:
let amount of screenings be 3x
let amount of cement be x
let amount of sand be 15x
=> 3x + x + 15x = 125
=> 19x = 125
=> x = 125 / 19
amount of sand = 15x
= 15 * 125/19
=98.684 tonnes
pls mark brainliest
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