Question

वाळवंटी प्रदेशात कमी असल्याने हवा कोरडी असते​

Answer 1

Answer:

वाळवंटी प्रदेशात सापेक्ष आर्द्रता कमी असल्याने हवा कोरडी असते.

Explanation:

follow with

Answer 2

Explanation:

Correct Question:

A boat can move downstream at a speed of 16 km/h and upstream at a speed of 9 km/h. What is the speed of the stream and the speed of the boat in still water?

Let us assume:

The speed of the boat in still water be x.

And the speed of the stream be y.

The speed of boat:

Downstream = 16

↠ x + y = 16 (i)

Upstream = 9

↠ x - y = 9 (ii)

Adding equation (i) and equation (ii):

↠ x + y + (x - y) = 16 + 9

↠ x + y + x - y = 25

↠ 2x = 25

↠ x = 25/2

↠ x = 12.5

In equation (i):

↠ x + y = 16

Putting the value of x.

↠ 12.5 + y = 16

↠ y = 16 - 12.5

↠ y = 3.5

Hence,

The speed of the boat in still water is 12.5 km/hr.

The speed of the stream is 3.5 km/hr