Time is taken by two trains running in opposite directions to cross a man standing on the platform in 28 seconds and 18 seconds respectively. It took 24 seconds for the trains to cross each other. What is the ratio of their speeds?
Let the speed one train be x m/s and the speed of the second train be y m/s. Length of the first train = Speed × Time = 28x Length of second train = Speed × Time = 18y So, {(28x + 18y)/(x + y)} = 24 ⇒ 28x + 18y = 24x + 24y ⇒ 4x = 6y Therefore, x: y = 3:2
Insects, which feed on one type of food, are called _______.
Which of the following is correctly matched ?
The silkworm larva ceases to eat and begins spinning silk all over its body from ____
Which one of the following hormones sclerotizes the newly formed cuticle?
Shellac is secreted by
Apis mellifera is also known as
Order in which mosquito are present is
………………….. is associated to achieve the goal of Sweet Revolution in country
Tassar silk is also known as
Which of the following pair is not correct?
