Question

What mass when increased by 45% becomes 870 kg?

Answer 1

Answer:

X+45% of X=870

X=87000/145

X=600

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Answer 2

Answer:

600kg

Step-by-step explanation:

let the mass be z

45% of mass = (45×z)/100

so new increased mass will be z + (45×z)/100 = 145z/100 = 29z/20

now we know the new mass is 870 kg

∴29z/20 = 870

∴z=870×20/29 = 600

∴z=600kg

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