Question
A person at a railway station hears the sound of an
explosion 3.6 km away, after 40 seconds. What is the speed of sound in this situation?Solution
ATQ,
Speed of sound
= (3.6 × 1000) / 40
= 3600 / 40
= 90 m/s
The salaries of Ravi and Sumit are in the ratio 4: 5. If the salary of each is increased by Rs6,000 the new ratio becomes 35:40. What will be Sumit's in...
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Two numbers ‘A’ and ‘B’ are in the ratio 3:4 respectively. If ‘A’ is increased by 33(1/3)% and ‘B’ is increased by 25%, what will be the...
If A:B = 2:3, B:C = 4:5, and C:D = 6:7, find A:D.
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