Question
Find the sum of all the numbers between 100 and 800,
which are divisible by 6, 8 and 10.Solution
LCM of 6, 8 and 10 = 120 So, desired numbers are: 120, 240, …, 720 Number of terms = (720 – 120)/120 + 1 = 6 Sum = (6/2) × [120 + 720] = 2520
The area of the largest triangle inscribed in a semi-circle of radius R is-
A triangle ABC is inscribed in a circle with radius 10 cm. The sides of the triangle are AB = 12 cm, BC = 16 cm, and AC = 20 cm. Find the area of the tr...
If the ratio of side of a ∆ is 3:4:5, and a ┴ from opposite vertex drawn to the biggest sides at D, if the length of biggest side is 10 then find ra...
What will be inradius of an equilateral triangle of side 10 cm?
The length of the each side of an equilateral triangle is 28√3 cm . The area of circumcircle, (cm 2 ) is
B1 is a point on the side AC of ∆ ABC and B1B is joined. line is drawn through A parallel to B1B meeting BC at A1 and another line is drawn through C ...
In ∆ABC, AB = 5cm, BC = 10cm, and AC = 13cm then find out the value of cos A.
Angles of a triangle are in the ratio 2 : 3 : 7. Find the sum of the smallest and largest angle of the triangle.
An angle is equal to 3/7 of its supplement. The angle is :
