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We can say that Let the total work = 60 units (L.C.M of 20 & 30) Efficiency of 'R' = 60/20 = 3 units /day Efficiency of 'A' = 60/30 = 2 units/day Their combined efficiency = 2 + 3 = 5 units/day To complete the work in 6 days, there combined efficiency should be 60/6 = 10 units/day Required percentage increase = {(10 – 5) × 100}/5 = 100%
If A = (7)1/3 + (7) -1/3, then the value of {3A3 – 9A} will be:
√4096 + √(?) + 13 – 29 = 148
if a2 + b2 + c2 = 2(4a -5b -9c)-122 , then a-b-c = ?
If, 4x2 + y2 + 12x + 6y + 18 = 0, then find the value of (2x + y)/(y + 6x).
If a + b = 56 and (a – b)² = 496, find the value of the product of a and b.
The speed of a car is 25% more than that of a bike. Both of them start from a same point. After travelling for 4 hours, the speed of the bike is increas...
√(92×8 ×52+700) = ?