Question
A cistern A has 270 litres of a milk–water mixture in
the ratio 6:x. If 56 litres are withdrawn and mixed with 8 litres of water in another vessel B, the resulting milk to water ratio becomes 7:5. What was the initial milk quantity in A?Solution
Milk in 56 litres = (6/(6+x)) × 56 = 336/(6+x) litres Water in 56 litres = (x/(6+x)) × 56 = 56x/(6+x) litres Water in B after addition = 56x/(6+x) + 8 Given: 336/(6+x) : [56x/(6+x) + 8] = 7:5 336/(6+x) = (392x/(5(6+x))) + 56/5 Multiply both sides: 1680 = 392x + 336 + 56x 1680 – 336 = 448x → 1344 = 448x → x = 3 Initial milk = (6/9) × 270 = 180 litres.
A user communicates with a computer with the help of:
Which of the following permanent database that has an entry for each terminal symbol
The component responsible for synchronizing operations using timing signals is _______________. Â
Which of the following file format is not a video file format?
 Recently who among the following was re-elected general secretary of the 20th Central Committee of the Communist Party of China (CPC)?
Which of these are examples of interpreted programming languages? Â
Pre-programmed formulas in MS Excel are called _______. Â
Which of the following technologies were used by third-generation computers?Â
________ is the highest priority interrupt capable of interrupting all software and non-vital hardware devices.Â
Which type of network mostly we build, when two or more branches of an Organisation, situated in different countries, are connected together using inter...
