Question

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

Answer 1

Answer:

10

Step-by-step explanation:

Number of samples collected =》 Net. depth / Distance between the adjacent symbol.

Net depth =》 Final depth - Initial depth

Net depth =》35 - 5

=》 30m

Number of symbol collected =》 30 / 3

=》 10

Since the man started to collect the samples from 5m deep anything before the 5m should not be counted or considered.

Thus no. of symbols collected is 10.

Answer 2

Answer:

Step-by-step explanation:

for this question, Arithmetic Progression could be used

AP: 5,8,11,14........35

a(n) = 35

a = 5

n = ?

d = 3

a(n) = a + (n-1)d

35 = 5 + (n-1)3

30 = (n-1)3

n-1 = 10

n = 11

thus he collected 11 samples

hope this helps ☺️