Which of the following equations represents the number of day in which B and C working together can finish the same work?
Combined ratio of efficiency of (A + B), (B + C) and (A + C) is: A + B B + C A + C 4 5 5 7 -------------------------------------------------- 4k : 5k : 7k (Where K is a constant) A + B + B + C + A + C = 2(A + B + C) and 2(A + B + C) = 16k A + B + C = 8 k Note that combined efficiency of (A + B + C) is twice of the efficiency of (A + B). [Since, 8 = 4 × 2] Therefore, A and B working together will finish the work in (40 × 8)/4 days (40 × (12-4))/4 days 40 $ (12 # 4) ^ 4 days Similarly, B and C working together will finish the work in (40 × 8)/5 days (40 × (4+4))/5 Days 40 $ (4 @ 4) ^ 5 days Similarly, A and C working together will finish the work in (40 × 8)/7days (40 × (12-4))/7 Days 40 $ (12 @ 4) ^ 7 days Again, time required to finish the work by A alone (64 ×40)/ (64-40) Days 64 $ 40 ^ (64 # 40) days Since, B and C working together finish the work in 64 days while A, B and C working together finish the work in 40 days.
Suns heat reaches us by –
Which of the following is a process in which water from any source change into vapour state ‘due to heat’?
A day is considered a rainy day when it receives a rainfall of:
Which of the following organelles is NOT bound by a membrane?
Which of the following mixture is burnt to produce very high temperatures and are used for cutting metals and for
welding?
Which of the following pairing denoting the mixture of gases in air is NOT correct?
Motion that repeats itself after some period of time, is called ______ motion.
What is the industrial name of Epsum?
Which of the following is NOT a part of the 'Five Fs' in maintaining sanitary hygiene?
