Advertisements
Advertisements
प्रश्न
A boy played 100 games, gaining Rs. 50 on each game that he won, and losing Rs. 20 for each game that he lost. If on the whole he gained Rs. 800, find the number of games that he won.
उत्तर
Let the number of games that he won be x.
So, the number of games that he loss is 100 - x.
As per the given condition,
50x - 2000 + 20x = 800
⇒ 50x - 2000 + 20x = 800
⇒ 50x + 20x = 2800
⇒ 70x = 2800
⇒ x = `(2800)/(70)`
⇒ x = 40
Hence, he won 40 games.
APPEARS IN
संबंधित प्रश्न
Solve the following equation:
`"a"/15 - 2 = 0`
Solve the following equation:
`3/16 "m" = 21`
7 (x - 2) = 2 (2x - 4)
Solve the following equations: a(x - 2a) +b (x - 2b) = 4ab
The measures of angles of a quadrilateral in degrees are x°, (3x-40)°, 2xo and (4x+20)o. Find the measures of the angles.
The difference of the squares of two consecutive even natural numbers is 68. Find the two numbers.
The length of a rectangle is 30 more than its breadth. The perimeter of the rectangle is 180 cm. Find the length and breadth of the rectangle.
The perimeter of a rectangular field is 80m. If the breadth is increased by 2 m and the length is decreased by 2 m, the area of the field increases by 36m2.Find the length and breadth of the field.
A and B together can complete a piece of work in 6 days. A can do it alone in 10 days. Find the number of days in which B alone can do the work.
Tap A can empty a tank in 6 hours. Tap A along with Tap B together can empty the tank in `3(3)/(7)" hours"`. Find the time Tap B alone will take to empty the tank.
