Archives

A well of diameter 3m ,dug 14m deep. The earth taken out of it has been spread evenly all around it in the shape of a circular ring of width 4m to form an embankment. Find the height of the embankment.

Solution: Volume of cylinder = πr2h Here radius of well, r1 = 1.5m Depth, h1 = 14 m Embankment will be in a cylindrical shape having... View Article

The greatest negative integer is

Solution: -1 is the greatest negative integer.... View Article

Mauli purchased a designer saree from Mumbai at 8/9th of its MRP, When she came back to Delhi, her neighbour coaxed Mauli to sell the saree to her. She was even ready to pay 9% more than its MRP. What would Maull’s gain percentage be, If she decides to sell the saree to her neighbour?

Solution: Let x be the MRP of saree. Amount Mauli paid (cost price) = (8/9)x Amount neighbour will pay for saree (selling price) = x+0.09x =... View Article

My cousin has invested a lot of money ____ farming.

(A) into (B) in (C) on (D) for Solution: My cousin has invested a lot of money in farming. Hence option B is the answer.... View Article

The ratio 3:8 is equal to –%

a. 3.75% b. 37.5% c. 0.375% d. None of these Solution: To convert a ratio m:n into the form of a percentage, divide m by n and then multiply the... View Article

Lysosomes are also mainly called as

a) suicide bags b) killer bags c) secretory vesicles d) none of these Solution: Lysosomes are membrane bounded organelle which acts as a... View Article

The broad green part of the leaf is called

a) Thalamus b) Petiole c) Lamina d) Midrib Solution: The broad green part of the leaf is called the lamina. It is the expanded... View Article

Prove tan 9⁰– tan 27⁰– tan 63⁰+ tan 81⁰= 4

Solution: tan 90 - tan 270- tan 630 + tan 810 = tan 81 + tan 9 - (tan 63 + tan 27) = cot 9 + tan 9 - (cot 27 + tan 27) [since tan (90 - x) =... View Article

Sita can cut 8 onions in 10 minutes and Jyoti can cut 6 onions in 5 minutes. How much time will they take to cut 24 onions together?

Solution: Number of onions cut by Sita in 10 min = 8 Number of onions cut by Sita in 1 min = 8/10 Number of onions cut by Jyoti in 1 min = 6/5... View Article

Formula of cot(3x) is

Solution: cot 3x = (3cot x - cot3x)/(1 - 3cot2x)... View Article

How to convert degree to percentage in pie chart?

Solution: A circle has 3600. ie 100% = 3600 So 1% = 3.60 10 = (100/360)% To convert degree to percentage in pie chart, multiply the given... View Article

The mean of x+2, x+3, x+4 and x-2 is:

Solution: Mean = sum of terms/number of terms = (x+2+x+3+x+4+x-2)/4 = (4x+7)/4... View Article

If the mean of x+2, 2x+3, 3x+4 and 4x+5 is x+2 then find the value of x.

Solution: Mean = (x+2+2x+3+3x+4+4x+5)/4 = x+2 => (10x+14)/4 = x+2 => 10x+14 = 4x+8 => 6x+6 = 0 => x = -1... View Article

Measure of complete angle

Solution: Measure of the complete angle is 3600. A straight line makes an angle of 3600 to reach its initial position completely by the... View Article

Differentiate X³+ 3X²+X.

Solution: f(X) = X3+3X2+X We use the rule (d/dx)xn = nxn-1 f’(X) = 3X2+6X+1... View Article

Convert 95 degrees fahrenheit to degree Celsius

Solution: We use the formula 0Celsius = (5/9)(0Fahrenheit - 32) = (5/9)(95 - 32) = (5/9)63 = 35 95 degrees Fahrenheit = 35 degree Celsius... View Article

How many bricks, each measuring 25 cm × 11.25 cm × 6 cm, will be needed to build a wall of 8 m × 6 m × 22.5 cm?

a. 5600 b. 6000 c. 6400 d. 7200 Solution: Volume of cuboid = length×breadth×height Volume of a brick = 25... View Article

47,322 bulbs are to be packed in several boxes. Each box should contain equal numbers of bulbs and no bulb should be left unpacked. The number of boxes used can be:

a. 12 b. 11 c. 8 d. 14 Solution: Given there are 47,322 bulbs to be packed in several boxes. 47322/12 = 3943.5 47322/11 = 4302 47322/8 =... View Article

The reciprocal of a positive rational number is always negative. If true then enter 1 and if false then enter 0.

Solution: The reciprocal of a positive rational number is always positive. The given statement is false. So the correct option is 0.... View Article

The component of a vector is

a) always less than its magnitude b) always greater than its magnitude c) always equal to its magnitude d) none of these Solution: The magnitude... View Article

M	T	W	T	F	S	S
						1
2	3	4	5	6	7	8
9	10	11	12	13	14	15
16	17	18	19	20	21	22
23	24	25	26	27	28	29
30	31