17. ) If 7kg of sugar costs 112, find the cost of 25kg of sugar?
by using the formula of direct and Inverse proportion
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17. ) If 7kg of sugar costs 112, find the cost of 25kg of sugar?
by using the formula of direct and Inverse proportion
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Explanation:
since you can imagine that as kg of sugar increases the cost increases...as you know when you buy sugar in shop
it means kg of sugar is directly proportional to the cost of sugar hence the ratio of the two is a constant
hence this is case of direct proportion
let X be the kg of sugar
let Y be the cost of sugar
X/Y= k
7kg/112rs=k
when X=25 kg, Y= ?
we know k value
25kg/cost of sugar=k
25kg/cost of sugar=7kg/112rs
cost of sugar= 400₹
alternative method:
7kg ------- 112rs
25 kg -------- ?
by cross multiplication
?= (112*25)/7
?= 400₹
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thank you
Answer:
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Hello Dear ❤
Here is u r Ans ➡
✨If 7 kg sugar cost rupees 112
Then,
= 112 ÷ 7
= 16
Means 1 kg = 16 rupees
So,
= 25 × 16
= 400
Ans ➡ 25 kg sugar = 400 rupees
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Hope This Helps u ☺