A and B together can do a piece of work in (p-8.8) days.The efficiency of D is 10% less than the efficiency of B. A and C together can do the same piece of work in (p-8) days. D alone can do the same piece of work in 20 days. The ratio between the efficiencies of B and C is 4:3 respectively. Find out the value of ‘p’.
Let’s assume the total work is 360 units. D alone can do the same piece of work in 20 days. Efficiency of D = 360/20 = 18 units/day The efficiency of D is 10% less than the efficiency of B. 18 = (100-10)% of efficiency of B 18 = 90% of efficiency of B 18 = 0.9 x (efficiency of B) efficiency of B = 20 units/day The ratio between the efficiencies of B and C is 4:3 respectively. efficiency of C = (20/4)x3 = 15 units/day A and B together can do a piece of work in (p-8.8) days. (Efficiency of A + 20) x (p-8.8) = 360 (Efficiency of A + 20) = 360/(p-8.8) Efficiency of A = [360/(p-8.8)] - 20 Eq.(i) A and C together can do the same piece of work in (p-8) days. (Efficiency of A + 15) x (p-8) = 360 (Efficiency of A + 15) = 360/(p-8) Efficiency of A = [360/(p-8)] - 15 Eq.(ii) So Eq.(i) = Eq.(ii) [360/(p-8.8)] - 20 = [360/(p-8)] - 15 [360/(p-8.8)] - [360/(p-8)] = 20-15 [360/(p-8.8)] - [360/(p-8)] = 5 [72/(p-8.8)] - [72/(p-8)] = 1 5p 2 -84p+64 = 0 5p 2 -(80+4)p+64 = 0 5p 2 -80p-4p+64 = 0 5p(p-16)-4(p-16) = 0 (p-16) (5p-4) = 0 p = 16, 0.8 Here the value of ‘p’ will not be 0.8. Because some of the values will be negative which is not possible. So the value of ‘p’ = 16
Find the missing number in the given analogy:
144 : 1728 :: 169 : ?
In this question, the relationship between different elements has been shown in the statement.
After the statement, two conclusions have been giv...
Select the option that is related to the third word in the same way as the second word is related to the first word.
(The words must be considere...
Three statements are given, followed by three conclusions numbered I, II and III.
Assuming the statements to be true, even if they seem to be at ...
A situation is given, followed by two conclusions I and II. Read the situation and both the conclusions carefully and select the correct answer.
<...Select the option that will replace the question mark (?) in the figure given below to complete the pattern.
Ganesh said, "Anjali is my paternal grandfather's only daughter-in-law's only granddaughter". Ganesh is single and has only one sibling, I.e., an elder...
Study the given pattern carefully and select the letter that can replace the question mark (?) in it.
The following question is based on the given diagram. The triangle represents ‘teachers’, the circle represents ‘players’, and the rectangle rep...
'P + Q' means 'P is the daughter of Q'
'P × Q' means 'P is the son of Q'
'P – Q' means 'P is the wife of Q'
Which of the followi...