Question
‘M’ and ‘N’ together can do a work in 20 days.
If ‘M’ increases his efficiency by 25% while ‘N’ decreases his efficiency by 50%, then the time taken to complete the work remains unchanged. Find the ratio of efficiencies of ‘M’ and ‘N’, respectively.Solution
Let the efficiency of ‘M’ and ‘N’ be ‘x’ units/day and ‘y’ units/day, respectively. So, total work = {(x + y) × 20} units After change in efficiencies, Also, total work = (1.25x + 0.5y) × 20 So,
1.25x + 0.5y = x + y Or,
0.25x = 0.5y Or,
x : y = 2 : 1 So, ratio of efficiency of ‘M’ and ‘N’ = 2 : 1
Which letter would be the third from left end of the meaningful english word that can be formed by using third, fifth, seventh and fourth letters from t...
Find which one word cannot be formed from the given letters of the word.
‘ NAUGHTINESS ’
...How many meaningful words (more than 3 letters) can be formed using the letters of the given word 'DESIGNATION' ?
From the given word, select the word which cannot be formed using the letters of the given word.
TRANSPORT
If it is possible to make only one meaningful word using the third, fourth, sixth, and seventh letters of the word ‘ DOWNSTAIR ' using each letter onl...
Select the word which cannot be formed using the letters of the given word using the letters only once.
REVERSIBLE
A word has been given, followed by some words, one of which cannot be formed by using the letters of the word “ FRIGHTEN ” only once. Find that word...
If all the letters of the word ‘ EXEMPLARY ’ are replaced by their preceding letter as per the English alphabetical series, then how many vowels are...
From the given alternative words, select the word which CANNOT be formed using the letters of the given word:
REFRIGERATOR
Relevant for Exams:
