Question of solved question

# Question An iron pillar has some part in the form of a right circular cylinder and the remaining in the form of a right circular cone. The radius of the base of each of the cone and the cylinder is 8 cm. The cylindrical part is 240 cm high and the conical part is 36 cm high. Find the weight of pillar if 1 cubic cm of iron weighs 7.5 grams.

#### Frequently Asked Questions

Find the roots of the following quadratic equations by factorisation

Solution:

Explanation:

We have to find the roots of the following quadratic equations by factorisation:

If two tangents inclined at an angle of 60º

are drawn to a circle of radius 3 cm, then length of each tangent (in cm) is equal to :

Solution:

Hence, the length of each tangent is3√3cm

Final Answer:

The length of each tangent is 3√3cm

A polynomial of degree ___ is called linear polynomial

A: 0

B: 2

C: 1

D: None of these

Solution:

Explanation:

The general form of linear polynomial is P(x)=ax+b where x is a variable  and b is a  constant.

The first term of this polynomial has power 1 and therefore, the degree of the polynomial is 1.

A  polynomial of degree 1 is called linear polynomial.

Final answer:-

Hence,. The correct option is (C)i.e.1.

The longest chord of a circle is called its

A: radius

B: secant

C: diameter

D: tangent

Solution:

Explanation:-

The longest chord of a circle is called its diameter.

It’s the chord that passes through the centre of the circle.

Final answer:-

Hence option (c)is correct.diameter

Find quadratic polynomial whose zeroes are 3 - 3

Solution:

Explanation:-

Final answer:-

The quadratic polynomial is x2-9 whose zeroes are: 3, - 3