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CBSE->Std 10 Questions

Total Questions 2595
In the figure,if the semi perimeter of triangle ABC=23cm ,then AF+BD+CE=?
the probability that A solves a problem is 1/2,the probability that B solves the problem is 1/3 and the probability that C solves the problem is 1/4.if the three try to solve the problem independently ,find the probability that exactly one of them solves the problem.
List two functions performed by a) ovaries in a human female b) Fallopian tube
Is the chromosome no. of a zygote always constant? explain how?
Difference between a zygote and an embryo.
Difference between a zygote and a gamete
Difference between pollination and fertilization
Find the probability that a non leap year chosen at random has a) 52 Sundays b) 53 Sundays
Show that the point P(-4,2) lies on the line segment joining the points A(-4,6) and B(-4,-6).
A building is in the form of a right circular cylinder surmounted by a hemispherical dome having the same base radii. The base diameter of the dome is equal to 2/3 of the total height of the building. Find the height if the building, if it contains 67 1/21 cubic meter of air.
Will Ethanol form micelles?
Evolution can be equated with progress".justify the statement.
Define reproductive isolation with example?
properties of some elements are given.name them if possible and where would we locate this elements? 1.an element with variable valency(more than one)stored under water. 2.an element which is tetra valent in organic chemistry.
The radii of the circular bases of a right circular cylinder and a cone are in the ratio of 3:4 and their heights are in the ratio 2:3. What is the ratio of their volumes?
IF THE SUM OF 1ST m TERMS OF AN AP IS SAME AS THE SUM OF ITS FIRST n TERMS. SHOW THAT THE SUM OF ITS FIRST m+n TERMS IS ZERO
THE SUM OF THE 3RD AND 7TH TERMS OF AN AP IS 6 AND THEIR PRODUCT IS 8 FIND THE SUM OF 1ST 20 TERMSOF AP
what is the meaning of tyrannous?
What are the formalities or rules for writing Formal and Informal letters?
who is known as the father of consumer movement ?