Question

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{Please Explain The Process How You Are Doing}

⚫Rani can do 1/4 of a work in 4 days and B can do 1/5 of the work in 4 days. If both work together how long will it take to complete the entire work.

⚫A, b and c can polish the floor together in 4 days. B alone can police it in 10 days and c alone can policy in 12 days. In how many days will A can do this work alone.

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Answer 1

Answer:

Rani completes1/4 of work in 4 days.

1/4×4=work done by her in 1 day=1/16.

Vani completes1/5 in 4 days

1/5×4=work done by her in 1 day=1/20

if both work togethr...in 1 day,they complete 1/20+1/16=16/320+20/320 = 36/320 = 9/80.

Step-by-step explanation:

days for A to do complete job = 5 x 4 =20

let days for B to do complete job = X

work done by A in 1 day = 1/20

work done by B in 1 day = 1/X

days for both A and B to do complete job =12

work done by both A and B in 1 day =

(1/20) + (1/X) = 1/12

(X+20)/20X=1/12

12X+240=20X

8X=240

X=30days

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