Kai calculates that he spends 15% of a school day in science class. If he spends 75 minutes in science class, how many minutes does Kai spend in school?

Question

asked Apr 23, 2015 117k views

2 Answers

Vroomfundel · Answer 1 · 2015-04-29T21:01:13+0000

Answer-

Kai spends 8 hours 20 minutes in school.

Solution-

Let us assume, Kai spends x minutes in school.

Kai calculates that he spends 15% of a school day in science class and that is 75 minutes, i.e

$\Rightarrow x* (15)/(100)=75$

$\Rightarrow x=75* (100)/(15)$

$\Rightarrow x=(7500)/(15)$

$\Rightarrow x=500\ \text{minutes}$

$\Rightarrow x=(500)/(60)\ \text{hours}$

$\Rightarrow x=(25)/(3)\ \text{hours}$

$\Rightarrow x=8(1)/(3)\ \text{hours}$

Therefore, Kai spends 8 hours 20 minutes in school.