Question
The downstream speed of a boat is 6 km/hr more than its
upstream speed and the ratio of the speed of the boat in still water to the speed of the stream is 10:3. Find the total time taken by boat to travel 39 km downstream and 28 km upstream?Solution
Let the speed of boat in still water be x km/hr and that of stream be y km/hr. ATQ, ⇒  (x + y) – (x – y) = 6 ⇒  y = 3 km/hr ⇒  x = 3 × 10/3 = 10 km/hr Required time = [39/(10+3)] + [28/(10−3)] = 7 hr
Usually many field crops are propagated by seeds ,Which of the following crops is propagated vegetatively?
Colour of Bougainvillea is due to:
The genetic cause(s) of heterosis include:
Embryo transfer technology was initiated by:
Arrange these soil horizons from top to bottom.
(A) A1
(B) A2
(C) A3
(D) A0
(E) A00
Choose the correct answer from the options given below:
The first Indian Agricultural University was established in:
The groundwater table is measured by:
Glyoxylate cycle occurs in
Industrial relations consists of the relations between .....................?
The embryos of seeds contain enzymes responsible for aiding germination. During germination detection test, these enzymes gives a brilliant red stain up...
