If the weight of 12 sheets of thick paper is 40 grams, how many sheets of the same paper would weigh 2400 grams?
A
7500
B
8000
C
8500
D
9500
Answers
Answer:
Ans will be 720..I think none of the given option is correct
Answer:
Given,
A(4,0),B(−4,0)
Let P(x,y)
∣PA−PB∣=6
(x−4)
2
+y
2
−
(x+4)
2
+y
2
=6
(x−4)
2
+y
2
=6+
(x+4)
2
+y
2
squaring on both sides, we get,
(x−4)
2
+y
2
=36+(x+4)
2
+y
2
+12
(x+4)
2
+y
2
−16x−36=12
(x+4)
2
+y
2
−4(4x+9)=12
(x+4)
2
+y
2
16x
2
+81+72x=9[(x+4)
2
+y
2
]
7x
2
−9y
2
=63Fact: If P is point of intersection of any two chords AB and CD of a circle then,
PA⋅PB=PC⋅PD
⇒9⋅4=12⋅PD
⇒PD=
12
36
∴PD=3Steps of construction:
Draw a line segment BC of length 7 cm.
With center B, draw an arc of radius 6 cm.
With center C, draw an arc of radius 8 cm intersecting the previously drawn arc at A.
Join AC and BC to get the required triangle. ...
From A, cut arcs of equal radius intersecting AB and AC at E and F, respectively.Para-nitrophenol shows intermolecular hydrogen bonding, which causes an increase in boiling point as different molecules bond better with each other, as compared to ortho-nitrophenol, where there is intramolecular hydrogen bonding, which does not help in increasing the boiling point, hence p-nitrophenol has a higher