Advertisements
Advertisements
प्रश्न
Fifteen years from now Ravi’s age will be four times his present age. What is Ravi’s present age?
Advertisements
उत्तर
Let Ravi’s present age be x years.
Fifteen years later, Ravi’s age = 4 × His present age
x + 15 = 4x
On transposing x to R.H.S, we obtain
15 = 4x − x
15 = 3x
On dividing both sides by 3, we obtain
`15/3 = (3x)/3`
5 = x
Hence, Ravi’s present age = 5 years
संबंधित प्रश्न
Sum of two numbers is 74. One of the numbers is 10 more than the other. What are the numbers?
The perimeter of a rectangle is 13 cm and its width is `2 3/4` cm. Find its length.
The sum of three consecutive multiples of 7 is 357. Find the smallest multiple.
Three consecutive numbers whose sum is 12 are ______, ______ and ______.
The number of boys and girls in a class are in the ratio 5 : 4. If the number of boys is 9 more than the number of girls, then number of boys is 9.
Two equal sides of a triangle are each 4 m less than three times the third side. Find the dimensions of the triangle, if its perimeter is 55 m.
The perimeter of a rectangle is 240 cm. If its length is increased by 10% and its breadth is decreased by 20%, we get the same perimeter. Find the length and breadth of the rectangle.
A man was engaged as typist for the month of February in 2009. He was paid Rs. 500 per day but Rs. 100 per day were deducted for the days he remained absent. He received Rs. 9,100 as salary for the month. For how many days did he work?
Distance between two places A and B is 210 km. Two cars start simultaneously from A and B in opposite direction and distance between them after 3 hours is 54 km. If speed of one car is less than that of other by 8 km/hr, find the speed of each.
For what value of x is the perimeter of shape 77 cm?
