Archives

25 March 2020: The Hindu Analysis

UPSC Current Affairs Preparation: The Hindu Analysis Watch expert analysis of ‘The Hindu’ dated 25th March 2020. Important news and views to... View Article

Solve :- 1/3(7x-1) =1/4

Given (1/3)(7x-1) = 1/4 Find out We need to find the value of x Solution (1/3)(7x-1) = 1/4 Equating RHS to 0 by taking 1/4 on LHS, we get... View Article

A bucket of water 50kg is raised from a depth 100m. To the ground by a rope . The mass of the rope is 1kg per meter what is work done.

Given Bucket of water = 50 kg, dept or height h = 10 m, mass = 1 kg/ m g=9.8m/s Weight of bucket = 50 x 9.8 x 10 (work done in lifting) = 4900... View Article

Define herbivores

Animals that depend on plants for food are herbivores. These completely depend on plants. These have wide and flat molar teeth which help in... View Article

The number of girls and boys in a school is 525 and 675 respectively. What is the ratio of of the boys and girls in the simplest form

Simplest form of ratio of boys to girls = 675/525=27/21=9/7... View Article

The dimensions of a cuboid are in the ratio 5:2:1. It’s volume is 1250 cubic meters.Find the total surface area

Given that the length,breadth and height are in the ration 5:2:1Let us assume the dimensions to be as l=5x b=2x and h=x lbh=volume5x*2x*x... View Article

In a purse there are 20 rupee notes,10 rupee notes and 50 ruppee notes.The number of 20 rupee are 5 less than the number of 10 rupee note.if the total value of money in the purse is 860 find the number of each variety of notes.

Let the numberof 10 rupees note be xLet the number of 20 rupees note=x-5Let the number of 50 rupees note =2x+1Given that the total value is 860... View Article

How many kilograms of tea worth 300 rupeese per kg should be mixed with 10 kg of tea worth 240 per kg to produce a mixture to cost 260 per kg

The amount of tea worth Rs.300 be added be = X Quantity of tea taken that was worth Rs.240 =10 kg The mixture to be produced is of Rs 260 per... View Article

Find 3 consecutive even numbers such that the sum of the first and the last numbers exceed the second number by 10

Let the three consecutive even numbers be X , X+2 and X+4 As per the given statement X + X+4 =X+2 + 10 2X +4 = X + 12 X = 8 So first number... View Article

Refractive index of four medium A,B,C,D are 1.31,1.65,1.44,1.50 respectively the velocity of light is maximum in which ? And how

The refractive index of medium A is least that is 1.31, so the velocity of lght will be maximum in medium A. We know that the relationship... View Article

Write a short note on Chromatin

Chromatin is a substance in chromoome consisting of DNA and protein. Chromatin was dicovered by Walther Flemming. Histones are the major... View Article

A uniform metre scale is kept in equilibrium when supported at the 60 cm mark and a mass M is suspended from the 90cm mark in the figure. State with reasons, whether the weight of the scale is greater than, less than or equal to the weight of mass M.

Given that In equilibrium, weight of scale at 50 cm mark × (60 – 50) cm = weight of mass M × (90 – 60) cm Hence,... View Article

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

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. Macronutrients... 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... 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. The line of symmetry is the... 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 4 km/hour, time will be 2 hours... 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 will be =(x + 8)×4 + x×4 + x× 4 =... 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=2000kgvelocity=8m/sheight=120mtime=100sg=10m/s²W=mgh=2000x10x120=2.4x 10⁶JP=W/TP=2.4 x 10 ⁶/100P=2.4 x10⁴ W... View Article

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 sides are parallel and the... View Article