A manufacturer fixes his selling price at 33% over the cost of production. If cost of production goes up by 12% and manufacturer raises his selling price by 10%, his percentage profit is
There is a number consisting of two digits, the digit in the units' place is twice that in the tens' place and if 2 be subtracted from the sum of the digits, the difference is equal to th of the number. The number is
26
25
24
24
C.
24
Let the number be 10x + y
Unit digit(y) = 2x
∴ 10x + 2x = 12x
Sum of digits = 2x + x = 3x
According to the question,
∴ Number = 12x = 12 x 2 =24
AB and CD are two parallel chords of a circle of lengths 10 cm and 4 cm respectively. If the chords are on the same side of the centre and the distance between them is 3 cm, then the diameter of the circle is
The numerical values of the volume and the area of the lateral surface of a right circular cone are equal. If the height of the cone be h and radius be r, the value of is
300 grams of sugar solution has 40% of sugar in it. How much sugar should be added to make it 50% in the solution?
40 gram
10 gram
60 gram
60 gram
A and B can do a piece of work in 30 and 36 days respectively. They began the work together but A left after some days and B finished the remaining work in 25 days. After how many days did A leave?
10 days
6 days
5 days
5 days
A boat moves downstream at the rate of 1 km in minutes and upstream at the rate of 5 km an hour. what is the speed of the boat in the still water?
4 km/hour
4 km/hour