Geometry: Mensuration, Trigonometry

একটি ২১ মিটার দীর্ঘ ও ১৫ মিটার প্রস্থ বাগানের বাইরের দিকে ৩ মিটার প্রশস্ত পথ আছে । প্রতি বর্গমিটারে ২.৭৫ টাকা দরে পথটিতে ঘাস লাগাতে মোট খরচ কত হবে?

Triangle ABC has the following vertices: A (1, 0), B (5, 0) and C (3, 4). Which of the following is true-

Which of the following three side of the triangle? 

If the radious of cylinder is halved and height is doubled, then what will be the curved surface area?

If the radius of a circle is 6 cm and a circular segment subtends an angle 30° at the center, then the length of the arc is -

If radius of a circle is increased by 30% then its area is increased by

After purchasing a square sheet of plywood of area 169 square feet, I found that I must cut off 2 feet from one side, to fit a wall. What is the area, in square feet, of the wall?

A cylindrical rod of iron, whose height is equal to its radius, is melted and east into spherical balls whose radius is half the radius of the rod. Find the number of balls.

In the triangle, what is the value of x? 

A wall 8m long, 6m high and 22.5cm thick is made up of bricks, each measuring 25cm × 11.25cm × 6cm. The number of bricks required was-

A wire can be bent in the form of a circle of radius 56cm. If it is bent in the form of a square, then what will be its area?

The difference between the length and breadth of a rectangle is 23 meter. If its perimeter is 206 meter, then, its area is

If 0 ≤ x ≤ π/2 what is the maximum value of cos (x/3)?

The value of 

The one - third of the complementary angle to 60°is -

What is the volume of a cube whose surface area is 96?

If measures of the angles in a triangle are in the ratio of 1 : 2 : 6, then the degrees in the largest angle:

If each side of a rectangle is increased by 20% the increase in the area of a rectangle will be ____ . 

A box having height 2m, length 10m and width 7m have the top lid open. What is the surface area of the box?

What is the value of tan40° tan50° tan60°?