Question
Which of the following gas usually causes explosions in
coal-mines?Solution
Methane explosions occur in coal-mines when a buildup of methane gas, a by-product of coal, comes into contact with a heat source, and there is not enough air to dilute the gas to levels below its explosion point.
Find the radius of the sphere whose volume is 562.5π cm3
What will be inradius of a right angle triangle whose base is 11 cm & height is 60 cm ?
The lengths of three medians in a triangles are 15 cm, 20 cm, 25 cm. What is the area of that traingle (in cm 2 )?
If the volume of a cube is 64cm³, then the diagonal of cube is
In a triangle ABC, AB = 13 cm, BC = 14 cm, and AC = 15 cm. Find the area of the triangle and the length of the altitude from vertex A to side BC.
If I is the incentre of ΔABC , if ∠ BAC = 450 , then what is the measure of ∠ BIC?
In the figure given below, AC = 16 cm and BF = 5 cm. If AE:CE = 5:3, then find the perimeter of ΔABC.
If I is the incentre of ΔABC , if ∠ BAC = 700 , then what is the measure of ∠ BIC?
In a circle, the chord AB is 12 cm, and the perpendicular from the center O to the chord AB bisects it at point P. If OP = 5 cm, what is the radius of t...
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