L&T Company Numerical Ability Area and Volume

If radius of the base and height of a right circular cylinder are each increased by 20%, then volume of the cylinder will increase by:
A) 44% B) 68% C) 72.80% D) 64.6%

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ans is 72.08%
6 years agoHelpfull: Yes(0) No(0)

Ans: C).72.80%
PIE*r*r*h
radius and height is increased by 20%
=> 100*(120/100)*(120/100)(120/100)
=> 864/5 ==172.80
==> 72.80%
5 years agoHelpfull: Yes(0) No(0)

L&T Other Question

A businessman sold 4/5 of his stock at a gain of 20% and the rest at a gain of 15%. The overall percentage of gain to the businessman is: 1] 16% 2] 19% 3] 21% 4] 20% At the start of a programme, the ratio of the number of male participants to the number of female participants was 3:1. During the lunch break, 16 participants left and 6 more female participants registered. The ratio of the male to the female participants became 2:1. The total number of participants at the start of the seminar was
A) 64
B) 48
C) 54
D) Data Insufficient