Question
A meter-long pipe is made whose internal diameter is equal to the outer radius. How much material (cubic units) will be required to make the pipe if it holds 88/7m³?
The volume of cylinder = πr2h 88/7 = 22/7 ×1× r2 r = 2 , then R = 4 Materials used to make pipe (volume) = volume of outer cylinder - volume of the inner cylinder = πR2h-πr²h V = πh (R2 -r2 ) V = 22/7 ×1×(16-4) V = 22/7 ×1×12 V = 37.7 m³ More Geometry Questions
- An angle is equal to 3/7 of its supplement. The angle is :
- ∆ABC and ∆DEF are similar and their areas are respectively 64 cm2 and 121 cm 2 . If EF = 15.4 cm BC is?
- Question 3
- If in a ΔABC, AD is internal angle bisector & D is a point on BC, AB = 10 cm, BC = 12 cm then what is BD:CD?
- In ∆ABC , G is the centroid , AB = 8 cm, BC= 10 cm and AC = 12 cm , find GD, where D is the mid-point of BC?
- If angle between two sides of 3 cm & 2 cm of a triangle is 30°. what is the area of the triangle ?
- In triangle ABC, the sides are AB = 13 cm, BC = 14 cm, and CA = 15 cm. What is the length of the altitude from vertex A to side BC?
- If median AD of an equilateral ∆ABC is 21 cm and G is centroid. Find GD?
- ABC is an isosceles triangle inscribed in a circle. If AB = AC = 12√5 and BC = 24 cm then radius of circle is
- The length of the each side of an equilateral triangle is 21. The area of incircle, (cm 2 ) is
Hey! Ask a query
Please enter email id
The email must be a valid email address.
Please enter Mobile Number
Please enter valid Mobile Number
Please enter your Doubt
