construction 10

Reflection in a line - In Physics, we study reflection and the image formed by a plane mirror. We specially notice two properties of the image: (i) The image is as much behind the mirror as the object is in front of it. (ii) The mirror is the perpendicular bisector of the line joining the image and..

The owner of a super market recorded the number of customers visiting his store per hour in a day. The results were 15, 10, 12, 9, 18, 5, 8, 9, 15, 10 and 11. Construct a box plot for the data. => Figure 1 or Figure 3 or Figure 2 or Figure 4..

A circular tank of thickness 30 cm and height 80 cm whose diameter is 4 m is to be constructed in a storage yard. The rate of construction is $10 per m 3 . Find the cost of construction. [Take π = 3.] => $14.94 or $3090 or $284 or $30.90..

Construction - 2 - To bisect an angle , we are required to bisect (i) With B as centre and any suitable radius draw an arc to cut AB at D and BC at E respectively. (ii) Take any radius greater than of ED, not necessarily the previous radius. (iii) With this radius, taking points D and E a..

Two waves are said to interfere constructively or reinforce each other, if the resultant amplitude is maximum. The condition for constructive interference is that the phase difference A phase difference of 2 p corresponds to a path difference l . Let the phase difference f corre..

The church is on a hill top as shown in the figure. The figure is drawn to a scale of 1 : 400. Find the cost of construction of the road to the church if the rate of construction is $10 per unit. [Given a = 12 units and b = 16 units.] => $4000 or $8000 or $80010 or $80..

A zinc rod is dipped in ZnSO 4 solution and a Cu rod in CuSO 4 solution. The Zn rod is externally connected to the copper rod through a rheostat, a galvanometer and a plug key. fig 5.10 The two aqueous solutions are interlinked through a salt bridge which is an inverted 'u' tube which is ..

A survey of software engineers having more than ten years experience finds the average salary to be $120,000. If the standard deviation for the sample of 40 software engineers was $12,000, construct a 99% confidence interval of the mean(μ) for all engineers. => 118,102.63 <..

Age in years of twenty secondary school students visiting the zoo on a week day were recorded. The results were : 12, 16, 10, 19, 17, 10, 10, 11, 11, 11, 11, 12, 12, 11, 12, 13, 12, 14, 15, 18 Construct an ogive and find the median age and the interquartile r..

The students of Environmental studies collected the data of the life span of Zebras from the zoological authorities which are as follows. 20, 12, 19, 22, 28, 30, 17, 25, 10, 23, 16, 18, 21, 32, 15, 14, 8, 22, 11, 13, 18, 20, 21, 19, 19 Find the average life span of a Zebra by constru..