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Hemispherical bowl of internal radius 9 cm r = 9 volume of hemispherical bowl = 2/3 × π × r3 = 2/3 × π × 93 = 486π small cylindrical bottles of diameter 3 cm and height 4 cm radius = 3/2 volume of cylindrical bottles = πr2h = π × 3/2 × 3/2 × 4 = 9π no of bottles required = 486π/9π = 54
In a class of 60 students, 60% are boys. If 25% of the girls come to school by bicycle, find the number of girls who don't come cycling to school?
Rs.2420 were divided among A, B, C so that A: B=5 : 4 and B : C = 9 : 10 then C gets
906 ___ 6 ___ `sqrt1225` ___ 500 ___ 850 = 4,935
Due to 25% fall in the rate of eggs, one can buy 2 dozen eggs more than before by investing Rs.162. Then the original rate per dozen of the eggs is
69,012 ___ 20,167 ___ 51,246 ___ 6 ___ 50,000 = 7,386
`2/5` ___ 15 ___ 115___ 20 ___ 4 = 581
3,000 ___ 15 ___ 4 ___ (20)² ___ 20 = 32,200