Question
A person from the top of a hill observes a vehicle
moving towards him at a uniform speed. It takes 10 minutes for the angle of depression to change from 45° to 60°. After this the time required by the vehicle to reach the bottom of the hill isSolution
[tan 45° = 1] [tan Q = P/B] [tan 60° = √3 / 1] = (√3 – 1) = 10 min = 1 → (10 / √3 – 1) = (10 / √3 – 1) × (√3 + 1) / (√3 + 1) = (10(√3 + 1)) / 2 = 5(√3 + 1) = 5√3 + 5 = 5 × 1.732 + 5 = 8.66 + 5 => 13.66 = 13 min 40sec Ans
As per the guidelines of ICMR/NIN the percent of energy derived from cereals and nutricereals for an adult on a 2000 kcal diet is:
One kilocalorie equals:
0.005% is equal to
Which of the followings transmitted as wave,which penetrate food and are then absorbed and convert to heat.
Storage temperature for Asparagus is:
Who developed Frozen food in 1929?
Salting, as a preservative:
Substances that reduce the availability of one or more nutrients known as
M.S. Swaminathan was an Indian:
Fats are solid at room temp. due to the presence of ……Fatty acids
