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Q.1 If the number x , 6 and 9 are in continued proportion , find the value of x
We know that ,
If a , b , c are in continued proportion , then A : B = B : C
Given ,
6 , x , 9 are in continued proportion
=> 4 : x = x : 9
=> 4 × 9 = x × x
=> x = 36
Q.2 Cost of 4 dozens bananas is ₹ 60. How many bananas can be purchased for ₹ 12.50?
=> 1 dozens = 12 units
=> 4 dozens = 12 × 4 units
= 48 units
=> Number of bananas purchased for Rs. 60 = 48
=> Number of bananas purchased for Rs. 1 = 48/60
=> Number of bananas purchased for Rs. 12.50
= 48/60 × 12.50
= 24/30 × 12.50
= 12/15 × 12.50
= 4/5 × 12.50
= 4/5 × 1250/100
= 4/5 × 125/10
= 4/10 × 125/ 5
= 4/10 × 25
= 100/10
= 10
Q.3 answer is in pictures..
I hope this will help you dear..
Always stay safe and stay healthy..
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