Rate downstream = 7/10 x 60 = 42 km/hr Rate upstream = 42/2 = 21 km/hr Speed of current = 1/2 (Rate downstream – Rate upstream) ⇒ 1/2 (42 – 21) km/hr = 10.5 km/hr
A sphere is melted to form 81 identical cylinders. If radius of each cylindrical is 1/3rd of the radius of sphere and height of each cylinder...
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A rectangular plot has an area of 490 m². If the length of the rectangular plot is 24.5 m. Find the perimeter of the rectangular plot.
If two complementary angles are in the ratio of 5:1, find the greater angle.
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A kid has toys of three different shapes and he has labelled them as 'A', 'B' and 'C'. The following is also known about the toys: (Take π = 22/7)
