Ishaâ€™s grandfather was 4 times older to her 3 years ago. He would be two times of her age 25 years from now. 9 years ago, what was the ratio of Ishaâ€™s age to that of her grandfatherâ€™s age?
Let the length of the wire be h
Radius=2/2 mm = 1/10 cm
Volume = Ï€r^2h= 143.4
=> (22/7)âˆ—(1/10)âˆ—(1/10)âˆ—h = 143.4
=>h = (143.4âˆ—10âˆ—10âˆ—7)/22 = 4562cm = 45.63m = 45620mm
Students at a local college were asked how many hours they slept last night. The given values below shows the data. Find the probability that a randomly picked student slept for 6 hours?
Sleep Hours Count of Students
6 14
7 26
8 28
9 15
More than 10 8
A boatman goes 6 km against the current of the stream in 4 hours and goes 4.5 kms along the current in 90 minutes. How long will it take to go 24 km in stationary water?
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