Start learning 50% faster. Sign in now
Let time taken by third pipe to fill the tank = x hrs so time taken by 2nd pipe to fill the tank = x + 4 hrs & time taken by 1st pipe to fill the tank = x + 4 + 45 = x + 49 hrs; Hence 1/(x+4) +1/(x+49) = 1/x (x + 4 + x + 49)/ {(x + 4)(x + 49)} = 1/x (2x + 53)/(x2+ 53x + 196) = 1/x 2x2+ 53x = x2 + 53x + 196 x2 = 196 x = 14 hrs So time taken by 1st pipe to fill the tank = x + 49 = 14 + 49 = 63 hrs Alternate Method :- Let time taken by third pipe to fill the tank = x hrs so time taken by 2nd pipe to fill the tank = x + 4 hrs & time taken by 1st pipe to fill the tank = x + 4 + 45 = x + 49 hrs; Then x = root of (4 × 49) = root of 196 = 14 hrs So time taken by 1st pipe to fill the tank = x + 49 = 14 + 49 = 63 hrs.
The ideal relative humidity for long-term seed storage is around:
A large farming estate where a single cash crop is grown primarily for sale and export is called a:
Ratio of Evapotranspiration to potential evapotranspiration is known as ………………
नीचे दिए वाक्यों में से कुछ में त्रुटियाँ हैं और कुछ ठीक ह�...
The scientific name of Banana is _____
EC of saline soils is:
Water harvesting is defined as
Most of the gaseous interchange in soil occurs by
Upper limit of crossing over between two genes is:
Inflorescence of sugarcane is known as?