Question

A driver was collecting water samples from a lake. He collected a sample at every interval of 3 m,
starting at 5 m below the water surface. The final sample was collected at a depth of 35 m. How many samples did he collect?​

Answer 1

Answer:

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First he take sample from 5m below

at last from 35m depth

so total distance of tested= 35-5 = 30

at every 3m he took sample

so no. of times he collect sample= 30/3+1 = 10

because for 5th metre we have take one sample and starts taking the sample