Question
Present ages of ‘A’, ‘B’ and ‘C’ are in the
ratio 8:9:12, respectively. If present average age of ‘A’ and ‘C’ is 20 years, then find the age of ‘B’ when ‘C’ was 20 years old?Solution
Let the present ages of ‘A’, ‘B’ and ‘C’ be ‘8x’ years, ‘9x’ years and ‘12x’ years, respectively. ATQ; (12x + 8x) ÷ 2 = 20 Or, 20x = 40 So, x = 2 So, present age of ‘C’ = 12 × 2 = 24 years Present age of ‘B’ = 9 × 2 = 18 years Difference between the ages of ‘B’ and ‘C’ = 24 – 18 = 6 years So, age of ‘B’ when ‘C’ was 20 years old = 20 – 6 = 14 years
What was the difference between the number of petrol cars in perfect conditions of Hyundai & that of Ford?
If total sales of cars of all brands together increases by 10% in 2018 and the the sales of Santro in Maharshtra increased by 15% keeping percentage dis...
In which of the following year, the ratio of unit consumption to the no. of consumers is maximum?
By what per cent should the sales of Santro be increased so that its sales volume in Maharashtra becomes 18000, while in all other states remaining the ...
In which of the following years is the profit of the Airlines the maximum?
Water consumption in 2014 will be approximately how many times the total no. of consumer all over the years?
The total sales of Bolero, Tata Indica and Baleno together in 2017 is approximately what per cent of the total sales of Santro in all states together...
If total sales of shoes of all brands together increases by 15% in 2018 and the sales of Nike in Nasik increases by 10% keeping percentage distribution ...
In which of the following years is the percentage increase/ decrease in the total income of the Airlines the maximum in comparison to its previous year?
If in 2018, the total sales of Nike increased by 10%, while its sales in Chandigarh increased by 28% and that in Jaipur increased by 21% then what is th...
