Answer the Following Question with Explanation

Explanation:

There are 60 questions total.

Amita made 40 questions, but only 50% were considered "good" to be used. So that means 0.50*40 = 20 questions were used.

This means 60-20 = 40 questions remain, and this must be the amount of "good" questions that Meena provided.

We're told that 80% of Meena's questions were considered "good". Let x be the total number of questions she provided.

80% of x = (number of "good" questions Meena offered)

0.80x = 40

x = 40/0.80

x = 50

Therefore, Meena wrote up 50 questions.

14

step-by-step explanation:

14 x 3 = 42

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m