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ATQ, we can say that We have given the difference between Downstream speed (Ds) and Upstream Speed (Us) is 6km/hr Then, Ds - Us = 6…….eq1 Let the speed of Downstream(Ds) of boat be [Speed= distance/time] = 72/4 = 18km/hr Now, putting the Ds value in eq1 we will get the value for Us. = 18 – Us = 6 18 – 6 = Us 12km/hr = Us Therefore, the speed of boat will be = (1/2) x (18 + 12) = (1/2) x 30 = 15km/hr
The simplified value of (452 x 452 x 452 – 356 x 356 x 356)/(452 x 356 + 452 x 452 + 356 x 356) is:
The volume and height of a cylinder are 5346 cm3 and 21 cm. Find the radius of the cylinder.
OCR stands for __________
The probability of a student solving a problem correctly is 0.6. Out of 10 independent attempts, what is the probability that he solves at least 8 ?
In order that the lines y = x + 1, 2x - 3y + 5 = 0 and 3x - y + m = 0 may meet in a point, the value of m should be:
‘A’ alone can complete a work in 30 days. ‘B’ alone can complete the same work in 40 days. If ‘A’ and ‘B’ work together for 6 days, then...
Suppose the average of 322, 386, 418, 499 and 'a' is 437, then ind the value of 'a'
If a + b + c = 0, find the value of a³ + b³ + c³ .
The square roots of the complex number z=3+4i are:
Which of the following functions is not one-one?
