Question

Arnav spends 1 3/4 hours in studies ,2 1/2 hours in playing cricket .How much time did he spend in all?

Answer 1

3/4means 45 minutes of 1hour +half hour means 30 minutes of 1hour so. 45+30=1:15 minutes

Answer 2

Answer:

The total time Arnav spend is $4 \frac{1}{4} hours$

Step-by-step explanation:

1) Arnav spends $1 \frac{3}{4}$ hours in studies

Simplying it,

$\frac{3}{4} hours \: = \frac{3}{4} \times 60mins$

$= 3 \times 15 \: mins$

$= 45 \: minutes$

Therefore

$1 \frac{3}{4} hours \: = 1hour \: 45 \: minutes$

So Arnav spends 1 hour 45 minutes on studies, we can also say he spends 60 + 45 = 105 minutes on studies ( 1 hour = 60 minutes)

2) Then he spends $2 \frac{1}{2}$ hours in playing cricket.

Simplying it,

$\frac{1}{2} hours \: = \frac{1}{2} \times 60mins$

$= 30 \: mins$

Therefore

$2 \frac{1}{2} hours \: = 2hours \: 30minutes$

So Arnav spends 2 hours 30 minutes in playing cricket.

We can also say he spends 60+60+30= 150 minutes in playing cricket.

3) Total time he spend in all =

1 hour 45 mins + 2 hours 30 mins

= 3 hours (45+30) minutes ..Eq(1)

Now 45 + 30 = 75 minutes

= 60 + 15 minutes

= 1 hour 15 minutes

Putting the value in eq(1),

= 3 hours + 1 hour 15 minutes

= 4 hours 15 minutes

or

$15minutes \: = 15 \times \frac{1}{60} hours$

$= \frac{1}{4}$

Therefore

$4hours \: 15mins \: = 4 \frac{1}{4} hours$

Therefore the total time Arnav spends in all is $4 \frac{1}{4} hours$