ऊष्मा - L3 | डॉक्टरी थर्मोमीटर | प्रयोगशाला तापमापी | कक्षा 7 NCERT विज्ञान |Chapter 4 |Subhadra Mam

A line is a drawn from P(4,3) to meet the lines L_1 and l_2 given by 3x+4y+5=0 and 3x+4y+15=0 at points A and B respectively. From A , a line perpendicular to L is drawn meeting the line L_2 at A_1 Similarly, from point B_1 Thus a parallelogram AA_1 B B_1 is formed. Then the equation of L so that the area of the parallelogram AA_1 B B_1 is the least is (a) x-7y+17=0 (b) 7x+y+31=0 (c) x-7y-17=0 (d) x+7y-31=0

Find the L.C.M of 4/5, 2/3 and 5/7

If L _(1) : 4x - 3y + 7=0 and L _(2) : 8x - 6y -1 =0 are two tangents to a circle C, length of whose diameters is d, then d is equal to

Let E = 3, B = 7 and A = 4. Find the other digits in the sum {:(" B A S E "),(+"B A L L"),(ulbar(" G AM E S ")):}

In the morning, a milkman filled 5(1/2) L of milk in his can. He sold to Renu, Kamla and Renuka 3/4 L each, to Shadma he sold 7/8 L and to Jassi he gave 1(1/2) L. How much milk is left in the can?

Line L_(1) is parallel to vector vec(alpha) = - 3hati + 2hatj+ 4hatk and passes through a point A(7, 6, 2) and line L_(2) is parallel to a vector vec(beta) = 2hati + 2hatj + 3hatk and passes through a point B(5,3,4). Now a line L_(3) parallel to a vector vec(r) = 2hati - 2hatj - hatk intersects the line L_(1) and L_(2) at point C and D respectively, Find |vec(CD)| .

The ratio of milk and water in a pot is 5:7. If we add 5l milk and 5 l water then ratio becomes 3: 4. Find the initial quantity of milk.