construct a triangle xyz in which angle y=30°,angle z=90° and xy+yx+zx=11cm
Question
Maths
Feb. 20, 2020, 7:57 p.m.
Answer
Meera went to a park 150 m long and 80m wide. She took one complete round on its boundary. What is the distance covered by her?
Maths
Feb. 20, 2020, 7:33 p.m.
Answer
Describe the role of detritus feeders and decomposers in recycling of nutrient.
The angle of elevation from a point on the ground is 60°. After a flight of 30 seconds , the angle of elevation becomes 30°. If the airplane is flying at a constant height of 3000√3 m, find the speed of the airplane.
10th question I am not getting.
A distribution is negatively skewed with the coefficient of skewness as -2.9. The value of mean and mode are 125 and 138, respectively. Find the variance of the distribution.
Maths
Feb. 20, 2020, 11:04 a.m.
Answer
If t if the angle of elevation of a cloud from a point of h metre above a lake is alpha and the angle of depressionoffice reflection in the lake is beta prove that the height of the cloud is
h(tan beta tan alpha)/(tan beta- tan alpha)
h(tan beta tan alpha)/(tan beta- tan alpha)