Question
Two years from now, the grandson's age will be 25% of
the grandfather's age. Three years ago, the grandfather's age was five times the grandson's age. Determine the current age of the grandson.Solution
3 years ago from now, let the age of the grandson and that of the grandfather be 'y' years and '5y' years, respectively 2 years hence from now, age of the grandfather = 5y + 3 + 2 = (5y + 5) years 2 years hence from now, age of the grandson = y + 3 + 2 = (y + 5) years According to the question, (5y + 5) = (y + 5) ÷ 0.25 Or, 5y + 5 = 4y + 20 So, y = 15 So, present age of the grandson = 15 + 3 = 18 years
Oxidation number of Mn in KMnO₄ is
Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 9 hours, respectively. If pipe ‘C’ is opened along with pipes ‘A’ and ‘B’, then the...
Which of the following data structure is linear type?
A man can row a boat at 8 km/h in still water. If the speed of the water current is 2 km/h and it takes him 2 hours to row to a place and come back, how...
Which of the following statements probably do not reflect the federal spirit of the constitution?
1. The property of the centre in the states c...
Under the Maternity Benefit Act, of 2017, women employees are entitled to how many nursing breaks during their working hours?
Select the option that is related to the third term in the same way as the second term is related to first term and the sixth term is related to the fif...
A given resistance RRR is cut into 2 equal parts. The resistance of each part is:
Which of the below mentioned steps are likely to cause the appreciation of rupee against dollar?
1. Increase limit of FPI in Indian Bond market...
Three of the following four letter-clusters are alike in a certain way and one is different.
Pick the odd one out.
