Aptitude - Time and Work - Discussion

Discussion Forum : Time and Work - General Questions (Q.No. 20)

Time and Work

20.

Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:

Answer: Option

Explanation:

Ratio of times taken by Sakshi and Tanya = 125 : 100 = 5 : 4.

Suppose Tanya takes x days to do the work.

5 : 4 :: 20 : x x =		4 x 20
		5

x = 16 days.

Hence, Tanya takes 16 days to complete the work.

Discussion:

94 comments Page 9 of 10.

Deepti said: 1 decade ago

Thanks sundar that solves so many other related problems.

Kiran Joy said: 1 decade ago

Can't we take time taken by tanya and sakshi as 75:100.

Iqbal sofi said: 1 decade ago

It should be 15, because the 25% reduction of 20 is 15.

Annie said: 6 years ago

Can anyone please compare it with the 17th question?

(1)

Soumil said: 1 decade ago

The ratio should be 100:75::20:x, not 125:100::20:x.

Jasmin said: 1 decade ago

Can you explain me chain rule please?

5:4 :: 20:x.

Kajal said: 6 years ago

Here (125% of 1/20)=1/16 that means in 16 days.

Geetha said: 1 decade ago

Give a brief explain how 125:100 come?

Jigme Wangchuk said: 5 years ago

Anyone explain the correct answer.

Siddharth said: 1 decade ago

Thanks kamal you are right.

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