Question

A path 3.5m wide runs inside along the boundary of a square field whose side is 65m find the area of the path also find the cost of manuring the rest of the field at the rate of ₹25 per square metre​

Answer 1

Answer:

Side of outer sq = 65m

width of path = 3.5m

cost of measuring = 25 rupees/sq metre

side of inner sq = 65 - (2 * 3.5)

= 58m

area of path. = 65 * 65 - 58 * 58

= 4225 - 3364

= 861 sq metres

cost of measuring the rest of the field = 3364 * 25

= ₹ 84100

Answer 2

1°C1°C  rise in temperature is equal to a rise ofOne atmosphere is numerically equal to approximatelyDispersion is the term used to describe :A beam of white light is incident on a hollow glass prism. Then the light emerging from the prism gives from 0° and 90°

The critical angle for water is 48.2°48.2° . Then its refractive index isWhen a light ray suffers reflection, at the interface between air and glass, the change of phase in the reflected wave is equal toWhen a light wave travels from denser to rarer medium, its

P) velocity decreases R) wavelength increases Q) frequency remains unchanged

Duration of day time is greater than night time due toIf n(μ)=100, n(A)=50, n(B)=20 and n(A∩B)=10  then  n[(A∪B)c]=