Yatin takes three identical pieces of tape are shaped like : and arranges them like :

what is the area of the new shape thus formed?

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Which expression converts 45 degree to radians

If you could answer these your a life saver