Question
Peter and Rachel can complete a project together in 20
days. Peter takes four times as long as Rachel to complete the same project alone. Find the time taken by Rachel to complete the project alone.Solution
ATQ, Let Rachel's time to complete the project alone be 'r' days. Therefore, Peter's time is '4r' days. Their combined work rate is (1/r) + (1/4r) = (1/20). 
Rachel can complete the project alone in 25 days.
W is taller than K who is shorter than U. O is taller than D but shorter than K. U is shorter than W. Who is the tallest?
Among F, G, H, I, J and K. H is taller than only F and K and I is shorter than only J and G. If each of them has a different height who among them will ...
What could be the possible height of R?
There are five persons Q, W, R, T and Y of different weights. T is heavier than Q and Y but not the heaviest. W is the lightest. Who among the following...
Who among the following weigh lighter than D?
In a group of four persons B, N, V, and W, V is fatter than only W but not as fat as N. B is also not as fat as N. Who is the leanest person in the group?
What is the weight of T?
There are five friends - D, F, H, M and P who have different heights. F is the tallest. H is taller than only M. P is not as tall as D. Who among the fo...
Who among the following is shorter than I but heavier than I?
Who is the second heaviest person?
Relevant for Exams:
