A’ and ‘B’ alone can do a certain work in 20 days and 30 days, respectively. Both started the work together but after ‘x’ days ‘A’ left the work and the rest work was completed by B alone in ‘2x’ days. Find the total time taken to complete the whole work in this way.
Total work = 60 units (LCM of 20 and 30) Efficiency of ‘A’ = 60/20 = 3 units/day Efficiency of ‘B’ = 60/30 = 2 units/day According to the question, ‘A’ worked for ‘x’ days and ‘B’ worked for ‘2x days. Therefore, 3x + 2 × 2x = 120 Or 3x + 4x = 60 Or x = 60/7days total time taken to complete the whole work = 2×60/7=120/7days
Which of the following code for ‘manner’?
If all the letters in the word 'COLLECTION' are arranged in English alphabetical order from left to right and then all the vowels are changed to the nex...
If NORMAL is coded as MPQLBK and HOWARD is coded as GPVBQC, then what is the code for LEARNER?
Which of the following is the code of ‘start succeed’?
Which of the following is the code for ‘choice’?
In a language ‘red’ is called ‘green’, ‘green’ is called ‘yellow’, ‘yellow’ is called ‘white’ and ‘white’ is called ‘black...
If RBCAEKST stands for BRACKETS, what does ORAMTNCI stands for?
In a certain code language ‘SCREW’ is written as ‘RBQFV’ and ‘PEACH’ is written as ‘OFBBG’. How is ‘TOKEN’ written in that code? Â...
If in a certain code language ‘eight hard’ is coded as ‘biv tik’, then which of the following is coded as ‘give nine ten’?
...If each vowel of the word COMPETITION is changed to its next vowel in the English alphabets and each consonant is changed to its previous vowel of the E...