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Let the present ages of 'E' and 'F' be '2z' years and '3z' years, respectively. ATQ, (2z+6)/(3z+6) = 3/4 Or, 4×(2z+6) = 3×(3z+6) Or, 8z+24 = 9z+18 Or, 9z−8z = 24−18 So, z = 6 Present age of 'E' = 2z = 2 × 6 = 12 years Present age of 'F' = 3z = 3 × 6 = 18 years Required sum = (12 - 5) + (18 - 5) = 7 + 13 = 20 years
Which of the following is true regarding the periodic table?
What is used in cloud seeding to produce artificial rain?
Which particle is associated with Bose-Einstein Condensate?
Which of the following metals is placed at the bottom of the reactivity series?
One mole of any gas at standard temperature and pressure contains a volume of________?
Statement I: Glass is not considered as a true compound. Statement II: Glass does not have a definite melting point.
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Metallurgy is the process of:
Which of the following is an example of a colloidal solution?
What is the common name of sodium carbonate?
Anesthesia which is administered during the surgeries in the hospitals is a mixture of which of the following gases?