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According to Question; Efficiency of pipe ‘A’ = (120/15) = 8 litres/hour Efficiency of pipe ‘C’ = 8 ÷ 1.25 = 6.4 litres/hour Efficiency of pipe ‘B’ = 6.4 × 1.5 = 9.6 litres/hour Time taken by all the pipes together to fill the tank = {120/(8 + 6.4 + 9.6)} = (120/24) = 5 hours Or, time taken by all three pipes together to fill the tank = 5 × 60 = 300 minutes
In a circle, the length of a chord AB is 48 cm & radius is 25 cm. Find the distance between centre and chord.
Two chords AB and CD of a circle intersect at E such that AE = 3.4 cm, BE = 4.2 cm and CE = 2.6 cm. What is the approximate length of DE?
The minute hand of a clock is 28cm long. Find the area on the face of the clock swept by the minute hand between 8 a.m. and 8: 45a.m
One chord of a circle is given as 18.5 cm. Then the radius (r) of the circle must be:
The wheel of a car made 300 rotations. How much distance did the car travel if the diameter of the wheel is 28 inches? (1 inch = 2.54cm)