What is meant by power of a lens? You have three lenses L1, L2 and L3 of powers +10D, +5D and -10D respectively. State the nature and focal length of each lens. Explain which of the three lenses will form a virtual and magnified image of an object placed at 15 cm from the lens. Draw the ray diagram in support of your answer. 12.
Question
Maths
Feb. 15, 2019, 10:42 a.m.
Answer
In parallelogram ABCD, two points p and q are taken on diagonal BD such that DP = BQ show that: ∆ APB congruent ∆ CPD, AQ = CP ,APCQ is a parallelogram
English
Feb. 15, 2019, 6:57 a.m.
Answer
I have downloaded the app but it is not working properly so,what should i do
find the equation of line passing through(3,20 which are at an angle 45 degree with the line x-2y=3
Maths
Feb. 15, 2019, 12:46 a.m.
Answer
The radii of the circular ends of a frustum are 6cm and 14cm. If its slant height is 10cm, then its vertical height is :
a) 6cm b) 8cm c) 4cm d) 7cm
a) 6cm b) 8cm c) 4cm d) 7cm
10 students of Class X took part in a Mathematics quiz. If the number of girls is 4 more than the number of boys, find the number of boys and girls who took part in the quiz. (ii) 5 pencils and 7 pens together cost ` 50, whereas 7 pencils and 5 pens together cost ` 46. Find the cost of one pencil and that of one pen
question number 28 can we do this question with different manner ?