A sphere of radius 10 cm is melted andmade into a cone of height 10 cm

1.	A sphere of radius 10 cm is melted andmade into a cone of height 10 cm. Findthe diameter of the cone.Q54
Answer» Volume of spher=(4/3)πr³=(4/3)(22/7)(10)³ cm³=4190.48 cm³ Volume of cone=4190.48 cm³(1/3)r²h=4190.48r²=4190.48(3)/(10)r²=1257.14r=35.45 cm Therefore diameter of cone=70.9 cm mam option mey 10 , 20, 40, 80 hai If x = 3 is one root of the quadratic equation x2 – 2kx – 6 = 0, then find the value of k. If x = 3 is one root of the quadratic equation x2 – 2kx – 6 = 0, then find the value of k.

A sphere of radius 10 cm is melted andmade into a cone of height 10 cm. Findthe diameter of the cone.Q54

Answer»

Volume of spher=(4/3)πr³=(4/3)(22/7)(10)³ cm³=4190.48 cm³

Volume of cone=4190.48 cm³(1/3)r²h=4190.48r²=4190.48(3)/(10)r²=1257.14r=35.45 cm

Therefore diameter of cone=70.9 cm

mam option mey 10 , 20, 40, 80 hai

If x = 3 is one root of the quadratic equation x2 – 2kx – 6 = 0, then find the value of k.