Let the speed of upstream be x km/hr Speed of downstream = y km/hr 12/x+20/y= 4 ………….(i) 20/x+12/y=4 1/2…………………….(ii) Adding (i) and (ii), we get 32(1/x+1/y)=17/2…………..(iii) Subtract (i) from (ii), we get 8(1/x-1/y)=1/2…………..(iv) Adding (iii) and (iv), we get 2/x=17/64+ 1/16 2/x = 21/64 x = 128/21 km/hr Now, 21/128 - 1/y = 1/16 y = 128/13 km/hr Now, rate of current = 1/2(128/13-128/21) =1.8 Km/hr
When any plane passing through the central axis of the body divides the organism into two identical halves called
Sodium is known to increase yield of which crop?
Nutrient index approach of soil fertility evaluation was proposed by
Which of the following is an Adulterant for Honey?
Seed dormancy due to hard seed coats can be broken by:
Sodium deficiency in cow symptom and causes what?
______________ soils occupy largest area in dryland agriculture
Identify the incorrect/wrong statement about irrigation
Peat and Muck soils are
The mango variety Mallika is the cross between