Question
What is A's present age, if after 20 years his age will
be 8 times his age 15 years back?Solution
Let A's present age be x. A's age 20 years ago = (x - 20) A's age after 15 years = (x + 15) According to question, =>(x + 20) = 8 (x β 15) => x + 20 = 8x β 120 => 7x = 140 => x = 20 years
Find the time taken by a pipe, which releases 94.5 m3 of water in a minute to fill an empty cylindrical tank of radius 12 m and height 14 m. ...
The perimeter of a rectangle is given as 72 cm, and the side of a square is equal to the mean of the length and breadth of the re...
The length of the side of a cube is 7 cm. What is the total surface area of the cube?
The perimeter of a sector of a circle, whose radius is 18 cm, is 62 cm. If the length of a rectangle is 10 cm more than the arc subtended by the sector ...
The length of a rectangle is twice its width. If the perimeter of the rectangle is 60 cm, what is the area?
The volume of the cylinder is 12320 cm3 is less than the volume of the sphere. The radius of the sphere is 2.625 times the height of the cyli...
- A circular wheel makes 80 revolutions to cover 7.04 km. What is its diameter? (Take Ο = 22/7)
A boy is supposed to distribute Rs.2400 among his three friends P, Q and R in the ratio of 4:3:5 respectively, but mistakenly he distributed in the rati...
Length of a rectangle is equal to the side of a square. If area of the square and rectangle is 400 m2 and 240 m2, respectively the...
One side of a parallelogram is 25 cm and its distance from the opposite side is 9 cm. The area of the parallelogram is:
...
Relevant for Exams:
