Question

in sonar ,ultrasonic waved sent into the sea water and reflected waves from a sunken shi are received after 2:0s.if the velocity waves in the sea water is 1450ms1.find the depth of the sunken ship

Answer 1

Explanation:

what is the minimum and maximum number of digits in the sum if we add any two three digit no. s. any two no. may be 100 111 = 211 this would be the minimum and maximum would be 999 998 =1997 from here we can easily find out that for minimum no.