Embibe Experts Solutions for Chapter: Advance Maths, Exercise 5: Exercise 5

OABC is a rhombus whose three vertices A, B and C lie on a circle with centre O. If the radius of the circle is 10 cm. Find the area of the rhombus.

If two spheres have their radii in the ratio $2:3$, then the ratio of their volumes is _____

The number of triangles possible in a regular octagon is?

The height of a right prism with a square base is $15 \mathrm{cm}$. If the area of the total surface of the prism is $608 {\mathrm{cm}}^2$, its volume is -

Seven equal cubes of each side $5 \mathrm{cm}$ are joined end to end. Find the surface area of the resulting cuboid?

The length of a cube is increased by $12\%$, then find the percentage increase in its volume?

If the radius of the base and the height of a right circular cone are increase by $20\%$, then what is the approximate percentage increase in volume?

If the length of the equal sides of an isosceles triangle is $a \mathrm{unit}$ and the length of the third side is $b \mathrm{unit}$ then the area of the isosceles triangle is