Q3 of 65 Page 13

If 5 times of a positive whole number is less by 3 than twice of its square, then let us determine the number.

Let the positive number be x.

According to question,








As the number is positive, so, x = 3.


More from this chapter

All 65 →
1

The difference of two positive whole numbers is 3 and the sum of their squares is 117; by calculating, let us write the two numbers.

 2

The base of a triangle is 18m. more than two times of its heights, if the area of the triangle is 360 sq.m., then let us determine the height of it.

 4

The distance between two places is 200 km.; the time taken by motor car from one place to another is less by 2 hrs than the time taken by a zeep car. If the speed of the motor car is 5 km/hr. more than the speed of the zeep car, then by calculating let us write the speed of the motor car.

 5

The area of the Amita’s rectangular land is 2000 sq.m. and perimeter of it is 180 m. By calculating, let us write the length and breadth of the Amita’s land.