A man goes down stream with a boat to some destination and returns upstream to his original place in 6 hours. If the speed of the boat in still water and downstream are 6km/hr and 8km/hr respectively, the distance of the destination from the starting place in KMs is
Isha’s grandfather was 5 times older to her 9 years ago. He would be two times of her age 18 years from now. 12 years ago, what was the ratio of Isha’s age to that of her grandfather’s age?
Let the length of the wire be h
Radius=2/2 mm = 1/10 cm
Volume = πr^2h= 242
=> (22/7)∗(1/10)∗(1/10)∗h = 242
=>h = (242∗10∗10∗7)/22 = 7700cm = 77m
A mixture contains sugar solution and colored water in the ratio 7 : 9. If 13 liters of colored water is added to the mixture, the ratio becomes 4 : 7. Find the initial quantity of sugar solution in the given mixture (in liters).
The initial ratio is 7 : 9.
Let ‘k’ be the common ratio.
=> Initial quantity of sugar solution = 7 k
=> Initial quantity of colored water = 9 k
=> Final quantity of sugar solution = 7 k
=> Final quantity of colored water = 9 k + 13
Final ratio = 7 k : 9 k + 13 = 4 : 7
=> k = 4
Therefore, initial quantity of sugar solution in the given mixture (in liters) = 7 k = 28 liter
A is 7 years older than B who is two times as old as C. The total of the ages of A, B and C is 222 years. What is the value when the age of B is multiplied to the difference between ages of A and C ?
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Jass
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?