The weight of 63 boxes is 7 kg. What is the weight of 90 such boxes? How many such boxes would weigh 5 kg?
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Weight of 63boxes=7kg...so 90boxes=7/63*90=10kg...so..7kg=for 63boxes...so 5kgs=63/7*5=45 boxes
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Weight of 63 boxes = 7 kg
=> Weight of 1 box = 7/63 = 1/9 kg
Weight of 90 boxes = Weight of 1 box × 90 = 1/9 × 90 = 10 kg
No. of boxes weigh 5 kg = 5 ÷ Weight of 1 box = 5 ÷ 1/9 = 5 ×9 = 45 boxes
=> Weight of 1 box = 7/63 = 1/9 kg
Weight of 90 boxes = Weight of 1 box × 90 = 1/9 × 90 = 10 kg
No. of boxes weigh 5 kg = 5 ÷ Weight of 1 box = 5 ÷ 1/9 = 5 ×9 = 45 boxes
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