A solid metallic sphere of radius 12 cm is melted and recast into a cone having diameter of the base as 12 cm. What is the height of the cone?

Three bells ring at interval of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a par- ticular time They will ring to gether after every 

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

1728 ÷ ? + 149.98 × 25.15 = 3156 - 269.75

The height of a solid cylinder is 30 cm and the diameter of its base is 10 cm. Two identical conical holes each of radius 5 cm and height 12 cm are drilled out. What is the surface area (in cm²) of the remaining solid?

Directions: The sub divided bar diagram given below depicts Higher secondary Students of a school for three years. Study the diagram and answer the questions

In which year the school had the best result for Higher Secondary in respect of percentage of pass candidates? 

If   $$ a={b^2\over b-a} $$  then the value of a³ + b³ is 

Chords AB and CD of a circle intersect externally at P. If CD = 11.6 cm, PD = 6.4 cm and PB = 7.2 cm, then AB (in cm) is equal to:

if $$m+{1\over(m-2)}=4$$,then find the value of  $$ (m-2)^2+ \left({{1\over {m-2}}} \right)^2 \ $$