DABC is a tetrahedron and ABC is an equilateral triangle and AB = BC = CA = 2a.Given that DA = DB= DC and the distance to the plane ABC from D is 3a. Find the angle between i. DA and ABC face
Question
Maths
Nov. 14, 2018, 1:37 p.m.
Answer
Water flow out through a circular pipe whose internal radius is 1 cm at the rate of 80cm into an empty cylindrical tank the radius of whose base is 40 cm. By how much will the level of water rise in the tank in half an hour.
Maths
Nov. 14, 2018, 11:44 a.m.
Answer
Two poles of height a metres and b metres are p metres apart. Prove that the height h drawn from the point of intersection N of the lines joining the top of each pole to the foot of the opposite pole is ab÷a b metres
In a survey of 400 students of a college it was found that 240 study mathematics, 180 study Statistics and 140 study Accounts, 80 study mathematics and Statistics, 60 study Statistics and Accounts, 100 study Accounts and mathematics and 40 study none of these subjects. On the basis of this information answer the following questions.
Q1. Find the number of students who study Accounts only.
A drain cover is made from a square metal plate of side is 40 cm having
Maths
Nov. 14, 2018, 8:19 a.m.
Answer
A drain cover is made from a square metal plate of side 40 cm having 441holes of diameter of 1cm each drilled in it . find the area of the remaining square plate
Maths
Nov. 14, 2018, 7:18 a.m.
Answer
Prove that in two concentric circles the chord of the larger circle which touches the smaller circle is bisected at the point of contact
Maths
Nov. 14, 2018, 5:53 a.m.
Answer
Why in this question we didn't correct the class size please tell me