jamiehomer19 jamiehomer19

15-03-2022
Mathematics

contestada

If B varies directly to C and inversely to the cube of D, and B = 5 when C = 2 and D = 1, find B when C = 4 and D = 2

Respuesta :

zsm2800 zsm2800

18-03-2022

Answer:

5/4

Step-by-step explanation:

B = kC/D³

Given B = 5, C = 2, D = 1

so 5 = k(2)/1³ = 2k, k = 5/2 = 2.5

B = 2.5C/D³

when C = 4, D = 2

B = 2.5 * 4/2³ = 10/8 = 5/4

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