Maths-
General
Easy
Question
The radii 
of the escribed circles of the triangle 
are in H.P. If the area of the triangle is 24 
and its perimeter is 24 cm, then the length of its largest side is
- 10
- 9
- 8
- None of these
The correct answer is: 10
Given are in H.P.
are in A.P.
and
Also given
Related Questions to study
Maths-
In an acute angled triangle 
and
then
In an acute angled triangle and then
Maths-General
Maths-
If 
is the circumcentre of 
and
and
are the radii of the circumcircles of triangles 
and
respectively, then 
has the value equal to
If is the circumcentre of andand are the radii of the circumcircles of triangles and respectively, then has the value equal to
Maths-General
Physics-
In a transformer, number of turns in the primary are 140 and that in the secondary are 280. If current in primary is 
, then that in the secondary is
In a transformer, number of turns in the primary are 140 and that in the secondary are 280. If current in primary is , then that in the secondary is
Physics-General
Physics-
A transformer is often filled with oil. The oil used should have
A transformer is often filled with oil. The oil used should have
Physics-General
Physics-
The figure shows three circuits with identical batteries, inductors and resistances. Rank the circuits according to the currents through the battery just after the switch is closed, greatest first
The figure shows three circuits with identical batteries, inductors and resistances. Rank the circuits according to the currents through the battery just after the switch is closed, greatest first
Physics-General
Physics-General
Physics-
A square coil of side 25 cm having 1000 turns is rotated with a uniform speed in a magnetic field about an axis perpendicular to the direction of the field. At an instant t, the emf induced in the coil is e =200sin 100
. The magnetic induction is
A square coil of side 25 cm having 1000 turns is rotated with a uniform speed in a magnetic field about an axis perpendicular to the direction of the field. At an instant t, the emf induced in the coil is e =200sin 100. The magnetic induction is
Physics-General
Physics-
Quantity that remains unchanged in a transformer is
Quantity that remains unchanged in a transformer is
Physics-General
Physics-
Two parallel rails of a railways track insulated from each other and with the ground are connected to a millivoltmeter. The distance between the rails is one metre. A train is travelling with a velocity of 72 km-
along the track. The reading of the millivotmeter (in mV) is : (Vertical component of the earth’s magnetic induction is
Two parallel rails of a railways track insulated from each other and with the ground are connected to a millivoltmeter. The distance between the rails is one metre. A train is travelling with a velocity of 72 km- along the track. The reading of the millivotmeter (in mV) is : (Vertical component of the earth’s magnetic induction is
Physics-General
Physics-
A circular coil of diameter 21 cm is placed in a magnetic field of induction 10-4 T. the magnitude of flux linked with coil when the plane of coil makes an angle 30
with the field is
A circular coil of diameter 21 cm is placed in a magnetic field of induction 10-4 T. the magnitude of flux linked with coil when the plane of coil makes an angle 30 with the field is
Physics-General
Physics-
A 50 turns circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field 
increased from 0.10 to 0.35 T in 2 millisecond. The average induced emf in the coil is
A 50 turns circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field increased from 0.10 to 0.35 T in 2 millisecond. The average induced emf in the coil is
Physics-General
Physics-
A 
potential difference is suddenly applied to a coil with 
and 
. The rate of increase of current after 
is
A potential difference is suddenly applied to a coil with and . The rate of increase of current after is
Physics-General
Physics-
A solenoid is placed inside another solenoid, the length of both being equal carrying same magnitude of current. The parameters like radius and number of turns are in the ratio 1:2 for the two solenoids. The mutual inductance on each other would be
A solenoid is placed inside another solenoid, the length of both being equal carrying same magnitude of current. The parameters like radius and number of turns are in the ratio 1:2 for the two solenoids. The mutual inductance on each other would be
Physics-General
Maths-
In a certain test ai students gave wrong answers to atleast i questions; where i = 1, 2, ---------k and no student gave wrong answers to more than k questions, then number of wrong answers is-
In a certain test ai students gave wrong answers to atleast i questions; where i = 1, 2, ---------k and no student gave wrong answers to more than k questions, then number of wrong answers is-Maths-General
Maths-General
Maths-
In a certain test there are n questions. In this test 2n–i student gave wrong answers to atleast i questions where i = 1, 2, 3 ..... n . If the total no. of wrong answer given is 2047. Then n is equal to-
In a certain test there are n questions. In this test 2n–i student gave wrong answers to atleast i questions where i = 1, 2, 3 ..... n . If the total no. of wrong answer given is 2047. Then n is equal to-Maths-General
Maths-General
Maths-
In an examination of 9 papers a candidate has to pass in more papers than the number of papers in which he fails in order to be successful. The number of ways in which he can be unsuccessful is-
In an examination of 9 papers a candidate has to pass in more papers than the number of papers in which he fails in order to be successful. The number of ways in which he can be unsuccessful is-
Maths-General
