Question
Two pipes P and Q can fill a tank in 48 minutes and 64
minutes respectively. If both the pipes are opened simultaneously, after how much time Q should be closed so that the tank is full in 36 minutes?Solution
Let Q be closed after x minutes. Then, Part filled by (P+Q) in x min. + part filled by P in (36 – x ) min. = 1 x(1/48 + 1/64) + (36 - x) x 1/48 = 1 ⟹(7x/192) + (36 - x)/48 = 1 ⟹ 7x + 4 (36 – x ) = 192 ∴ x = 16 ∴ Hence, Q must be closed after 16 minutes
Which of the following potential is always negative?
In CRD design the degree of freedom for error is calculated by which formula?
Marconi wheat is known as:
Which crop is called 'camel crop"?
The synthesis of ATP via electron flow through the ETS, with oxygen as the terminal electron acceptor, is known...
According to latest Final estimates of Foodgrain production 2023-24, Which state is the largest producer of sugarcane in India?
Tikka disease of groundnut spreads fast under the conditions of:
Pradhan Mantri Krishi Sinchai Yojana (PMKSY) was launched in the year___
What is the meaning of the word "Chrysanthemum," as derived from its etymology?
Of which South-East-Asian country did Joko Widodo become the President in 2019 for the second time?
Relevant for Exams:
