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Let the total work = 120 units Efficiency of A when he can complete the whole work in 30 hours = 120/30 = 4 units/hour Efficiency of A when he can complete the whole work in 24 hours = 120/24 = 5 units/hour Amount of work done in 10 hours = 10 × 4 = 40 units Time taken to complete the remaining work = (120 – 40)/5 = 16 hours Therefore, total time taken = 16 + 10 = 26 hours
Which dating method is commonly used to determine the age of materials from prehistoric times?
A liquid initially contracts when cooled down to 4°C but on further cooling down to 0°C, it expands. The liquid is
What is the pH of a neutral solution at 25°C?
What is the equilibrium distance for Hydrogen atoms?
Which law governs the behavior of ideal gases?
Which acid is found in vinegar?
Sour Taste of Coca-Cola is due to the presence of which of the following acid?
Turquoise is an ore/mineral of:
In SONAR, we use
Which of the following substances will turn red litmus paper blue?