Question

A machine is used for making rubber balls and makes 500 balls in 30 minutes. How many balls will it make in 7 hours

Answer 1

in 30 min= 500 balls
I'm 60 min= 500/30*60
in one hour he makes 1000 balls.
so in 7 hours he will make 1000*7 balls
that means 7000 balls
hope it will help

Answer 2

• We know that

   1 h = 60 min.

So 7 h = 7 x 60 = 420 min.

Here

• In 30 min. a machine makes 500 balls .
• ''  1    ''         ''          ''         ''       500/30   ''
• '' 420 ''          ''    ''        ''           500/30 x 420  = 7000  balls.

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