ADITI Company Numerical Ability

Q. A circular metal plate of even thickness has 12 holes of radius 1 cm drilled into it. As a result the plate lost 1/6th its original weight. The radius of the circular plate is
Option
(a) 16sqrt2
(b) 8sqrt2
(c) 32sqrt2
(d) sqrt72

Read Solution (Total 1)

(d) sqrt72
Area of 12 holes=12*Pi*1^2=12*Pi
As 12*Pi=(1/6)th weight,so total Area of Plate=12*Pi/(1/6)=72*Pi
If r=radius of the plate,then its Area=Pi*r^2=72*Pi, So r=Sqrt72
11 years agoHelpfull: Yes(1) No(0)

ADITI Other Question

Q. A wholesaler allows a discount of 20 % on the list price to the retailer. The retailer sells at 5% below the
list price. If the customer pays Rs.19 for an article what profit is made by the retailer on it?
Option
(a) Rs.2
(b) Rs.3
(c) Rs.4
(d) Rs.4.5 Q. 3 machines a,b,c can be used to produce a product. Machine a will take 60 hours to produce a million units. Machine b is twice as fast as machine a. Machine c takes the same amount of time as machine a and b taken together. How much time will be required to produce a million units if all the three machines are used simultaneously?
Option
(a) 12 hours
(b) 10 hours
(c) 8 hours
(d) None of these