Question
Two pipes, P and Q, can fill a tank in 60 minutes and 100
minutes, respectively. A third pipe R can empty it in 1 hour 40 minutes. Initially, pipes P and R are opened. After 30 minutes, pipe Q is also opened. How long will it take to completely fill the tank?Solution
ATQ,
Let the tank's capacity be 300 litres (LCM of 60, 100 and 100)
Efficiency of P = 300 ÷ 60 = 5 litres/minute
Efficiency of Q = 300 ÷ 100 = 3 litres/minute
Efficiency of R = 300 ÷ 100 = -3 litres/minute
Tank filled in 30 minutes = (5 - 3) × 30 = 60 litres
Remaining volume = 300 - 60 = 240 litres
Time to fill remaining = 240 ÷ (5 + 3 - 3) = 240 ÷ 5 = 48 minutes
Total time taken = 30 + 48 = 78 minutes
The technique of making numerable copies of gene is called as?
Mendel chose ………….. pairs of contrasting characters for his study. In all the above crosses he obtained a definite phenotypic ratio of ………...
Which one of the following is not the law as per genetics?
Which of the following micro organism is used in genetic engineering?Â
Which of the following characters is not typical to class Mammalia?
Sex-influenced traits are autosomal qualities that are impacted by sex. An example of sex influenced traits is
The gene is considered the basic unit of inheritance which are passed from parents to offspring. The alternate form of a gene is termed as
When one single gene starts affecting multiple traits of living organisms, this phenomenon is known as…………………..
...A cross between an inbred line and an open pollinated variety also known as
The type of inheritance in which a sex linked gene is inherited from grandfather to grandson through daughter is called as
Relevant for Exams:
