A cylindrical piece of metal of radius 2 cm and height 6 cm is shaped into a cone of same radius. The height of the cone is:
1) 8 cm
2) 12 cm
3) 14 cm
4) 18 cm
The ratio of Viplav's age and Anil's age is 3 : 5 and the sum of their ages is 80 years. The ratio of their ages after 10 years will be: ' .
1)2 : 3
2) 1 : 2
3) 3 : 2
4)3: 5
A starts a business on Jan.1 with an investment of Rs.80,000. Four months later B joins with an investment of Rs.60,000. The percentage of profit B will get at the end of the year is nearly 1.42% 2.37% 3.33% 4.31%