Start learning 50% faster. Sign in now
Let the efficiency of 'X' and 'Y' be 'x' units/day and 'y' units/day, respectively. ATQ; 36 × (x + y) = 20 × (x + y) + 40y Or, 36x + 36y = 20x + 60y Or, 16x = 24y So, x = (3y/2) So, total work = 36 × {(3y/2) + y} = 36 × (5y/2) = '90y' units So, required time = 90y ÷ y = 90 days Alternate Solution Part of the work completed by 'X' and 'Y' together in 20 days = (20/36) = (5/9) Remaining part of the work = 1 - (5/9) = (4/9) which is completed by 'Y' alone in 40 days Therefore, time taken by 'Y' to complete the whole work alone = 40 ÷ (4/9) = 40 × (9/4) = 90 days
Select an appropriate figure from the four options that will come in the place of question mark (?) and complete the figure.
Which figure should replace the question mark (?) if the series were to continue?
In each of the following questions, find out which of the answer figures can be formed from the pieces given in the problem figure.
Select an appropriate figure from the four options that would complete the figure.