Urooz AliThree sums of speed distance and time are discussed in the video. The sums are given here. 1. A train 150 m long passes a telegrah post in 15 seconds.Find:a) Speed of the train in km/hr. b) Time taken by it to pass a plateform of 150 m long.Watch Solution in the Video … Read more
In this video sums related to relative speed of boat in standstill water stream and in a water stream having speed in the same direction and also in the opposite direction have been discussed. Watch the video and comment below. If you have sum of boat and stream then post it in the comment box. … Read more
Theorem :Tangent and radius of a circle are perpendicular to each other. Solution : Given: A circle with centre O. AB is the tangent to the circle at point B and OB is the radius of the circle.R.T.P. OB ⊥ AC Proof: 1. OB < OC || Since each point of the tangent other than ... Read more
Theorem: The angle in a semicircle is a right angle Given : A circle with centre 0 with � at centre and � at the circumference of the circle . RT.P. : the angle in a semicircle is a right angle. ie : ∠ ACB= 90o Statements: 1 𢈊OB = 2� || angle at the … Read more
Theorem : Opposite Angles of a Cyclic Quadrilateral are Supplementary. Solution : Given: ABCD is a cyclic quadrilateral.R.T.P.(Require To Prove) 1. � + � = 1800 2. � + � = 1800 Construction : Join OB and OD Proof: 1. ∠ BOD = 2 ∠BAD || Angle at the centre of a circle is … Read more
Theorem : A circle with centre O in which AB subtends 𢈊OB at centre and angle � at any point on the remaining part of the circle. R.T.P. – 𢈊OB = 2 x � Solution : Construction: Join CO and produce CO to point D . 1. In ∆AOC, OC = OA || Radii of … Read more
The concept of the calender originated from solar year. The earth completes its orbit about the sun in 365 days 5 hr 48 min 46 sec.This is called solar year. Total Number of months in a year = 12Total Number of days in a year = 365Total Number of days in a leap year = … Read more
Unitary means “of one” . Mathematically it means “1”. To know this in an easy way, I am writing few examples. Question 1: If the cost of one pen is Rs 2 . Find the cost of 25 Pens Question 2: If the cost of 50 pencils is Rs 500. oo . Find the cost … Read more