15 iron balls weigh 10 kg 50 g the number of balls will weigh 4 kg 690 g
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Answered by
43
Weight of one iron ball =10050/15
=670
No. Of balls *670 =4690
No. Of balls =7
ramalakshmi1998:
I said 10 kg 50 g not 1 kg 50 g you have to convert 10 kg into g and then do the sum
10050/15=670
No of balls = 670/67=10
Why 670 by 67
Answered by
37
The number of balls which will weigh 4 kg 690 g is 7.
Given, that the weight of 15 iron balls is 10kg 50g.
To represent this weight in gms, we know 1 kg = 1000gm, so:
10kg 50 gm = (10×1000)+50 = 10000+50 = 10050gm.
And, 4kg 690gm = (4×1000)+690 = 4690 gm.
So, 10050gm is the weight of 15 balls,
By unitary method, 1 gm is the weight of (15÷10050) balls.
Thus, 4690 gm(4kg 690gm) will be the weight of (15÷10050 × 4690) balls
= 7 balls.
So, 7 balls weigh 4kg 690gm.
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