If 15X +17Y=21. 17X +15Y =11 Then find the value of X -Y.
Answer: Let us consider the equations 15X + 17Y = 21……………..(1) 17X + 15Y = 11……………..(2) Subtracting equation (1) and... View Article
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Define nutrition
Nutrition is a method in which the food is consumed by the organisms into the body and utilizing the nutrients from the food. Explanation Macronutrients are nutrients that people... View Article
Water is flowing at a rate of 7metres per second through a circular pipe whose internal diameter is 2cm into a cylindrical tank the radius of whose base is 40 cm. Determine the increase in water level in 1/2 hours?
Given that: Rate of flow of water=7m/sec=700cm/sec Length of the water column in21hours=(700×30×60)cm water column forms a cylinder of radius1cmand... View Article
How many lines does the diamond have?
Diamond is a geometrical shape which has four sides and opposite angles are equal. It is a type of parallelogram.... View Article
A car made a run of 390km in ‘x’ hours. If the speed had been 4kmph more, it would have taken 2 hours less for the journey. Find ‘x’
Let the speed be v km/hour speed of run,v= distance/time = 390/x km/hourGiven that if this speed is increased by... View Article
A square lawn is bounded on the three sides by a path of 4m wide.If the area of the path is 7/8 that of the lawn, find the dimensions of the lawn.
let the legth of the side of the square be x marea of lawn = x²area of the path path... View Article
Calculate the work done A car of weight 20000N climbs up a hill at8m/s speed. Gaining a height of120 m in 100 s.
Given that:Weight=mg=20,000N=2000kg velocity=8m/sheight=120mtime=100sg=10m/s²W=mgh=2000x10x120=2.4x 10⁶JP=W/TP=2.4 x 10 ⁶/100P=2.4 x10⁴ W
If Diagonals of a rhombus is 10cm and 24 cm find its perimeter
Answer: A rhombus is a special case of a parallelogram, and it is a four-sided quadrilateral. In a rhombus, opposite... View Article
3x=2x+18
3x=2x+18 X = 18
A rectangle has dimensions 40m *25m. If the length and breadth are increased by 15% find the percentage increases in its area.
Area of rectangle =length×breadth Given, Length = 40 m and breadth= 25m Hence, area of the rectangle is 40m X... View Article
Which is more stable? 1:True Solution 2: Suspension
Suspension is more stable. This is because suspension does not mix with each other. The denser particles settle down at... View Article
A number x is 4 less than three times another number y. If their sum is increased by 5, the result is 25. Find both the numbers
Let the first number be xLet the second number be y According to given condition y= 3x-4Also given that if... View Article
How many surfaces does a coin have?
A coin has two flat surfacesa and one cylindrical surface.
Prove: cosA/(1+ sinA ) + (1+ sinA)/cosA = 2secA
Given cosA/(1+sinA) +(1+sinA)/cosA On taking the LCM, we get, = {cos²A +(1+sinA)²}/cosA.(1+sinA) Combining the like terms and adding and also... View Article
What is largest 2 digit multiple of 17
Let us have a look at the multiples of 17 first Multiples of 17 are 17 × 1 = 17 17... View Article
If the roots of the quadratic equation kx^2+(a+b)x+ab are (-1-b), the value of k is ?
Roots are given as (−1,−b) We will substitute x=−b k(−b)2+(a+b)(−b)+ab=0kb2−b2−ab+ab=0kb2−b2=0kb2=b2 k=1Hence k=1
Calculate the surface area of a cube of edge 4cm? what is the volume?
Given that side a=4cm We know that surface area of a cube= 6a2= 6 X 4 X 4 = 96... View Article
Which is the target organ of both adrenaline and insulin
The target organ of both adrenaline and insulin is Liver.
Explain the flow of electric current
Electric current moves from high potential to low potential. Positive being high in potential, electric current moves from positive to... View Article
An AP starts with a positive fraction and every alternate term is an integer . If the sum of the first 11 terms is 33, then the fourth term is what
We know thatSum to n terms= Sn= n/2(2a + (n – 1)d)Given that S11 = 33Substituting the values in the... View Article
