Question

1/5×2/5xD=1/4×D/100×f find f...
plz tell me explanation
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Answer 1

1/5x2/5xD=1/4xD/100xf

or,2D/25=fD/100

or, f=2/25x100=8

Answer 2

Answer:

f=1/128

Step-by-step explanation:

• ⅕×⅖×D = ¼×D/100×f

• 2D/25 = D/4(100×f)

• 2D/25 = D/400×4f

cancelling D on both sides, we get

• 2/25 = 1/400×4f

which gives

• 2×(400×4f) = 1×25

• 800×4f = 25

• 4f = 25/800

• 4f = 1/32

• f = 1/128