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Find the value of c in a triangle if the semi perimeter is 13 and the values of a and b are 8 and 7 respectively.

Given, Semi perimeter of triangle, S = 13 a = 8 b = 7 c = ? We know that... View Article

A car can reach a certain place in 12 hours at a speed of 60 km per hour. By how much should the speed increased so that it completely the journey in 10 hours?

Given, Speed of the car = 60km/hr Time taken by the car = 12 hours Distance to be travelled =... View Article

Select The Correct Option For Most Meta Directing Group

Select the correct option for the most meta directing group: a) NO2 b) OCH3 c) CHO d) CONH2 The correct... View Article

What Is Hemorrhage?

Hemorrhage is also known as bleeding and it means the loss of blood. When it happens inside the body it... View Article

A stone is dropped from a tower at a height of h. Another stone is thrown at a height of 4h. Determine the time at which both the stones meet.

S1 = \(\begin{array}{l}frac{1}{2}gt^{2}\end{array} \) S2 = \(\begin{array}{l}ut-frac{1}{2}gt^{2}\end{array} \) S1 + S2 = h 4h = \(\begin{array}{l}frac{u^{2}}{2g}\end{array} \) u = \(\begin{array}{l}sqrt{8gh}\end{array}... View Article

Name the zone of parenchyma which is present at the centre of the sunflower stem.

The stem of the sunflower is a dicot stem. The three regions of the stem are: a) Epidermis b) Cortex... View Article

What is the rancidity?

Rancidity is defined as a state of food in which the food becomes undesirable. Most of the times rancidity is... View Article

Difference between short-circuit and overloading

Answer: The difference between short circuit and overload are tabulated below. Short circuit Overload Short circuit occurs when there is... View Article

90%acid solution (90%pure acid &10%water) and 97% acid solution are mixed to obtain 21litres of 95% acid solution. How many litres of each solution are mixed

Consider the solutions to be A and B respectively Let X litres of A be mixed with Y litres... View Article

Explain why the aqueous solution of sodium carbonate is alkaline.

When sodium carbonate is dissolved in water it gets hydrolyzed and forms a weak acid, carbonic acid, and a strong... View Article

AOCB is a quadrilateral in circle with centre O.

Given, \(\begin{array}{l}angle ADC = frac{1}{2}angle AOC\end{array} \) We know that the angle subtended by the chord on the major area... View Article

Solve: X/2 + X/4= 1/8

Given, \(\begin{array}{l}\frac{x}{2} + \frac{x}{4} = \frac{1}{8}\end{array} \) Multiply by 4 on both the sides, we get ⇒ \(\begin{array}{l}\frac{4x}{2} + \frac{4x}{4}... View Article

A man sold an article for rs 495 and gain 10% on it find the cost price

Given, SP = 495 Gain = 10% \(\begin{array}{l}CP =\frac{100\times SP}{100+gain%}\end{array} \) Substituting the values in the above equation, we get... View Article

A small bulb has a resistance of 2 ohm when it is cold. It draws 0.4 ampere current from a source of4V and then starts glowing. Calculate the resistance when it is glowing

Answer: Given, Resistance (R cold) = 2 Ohm Current (I) = 0.4 Ampere Voltage (V) = 4V Let us calculate... View Article

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