Question

If the cost of the second article is x = 7:4 = 2800 : x
ratio of the length and the width of a rectangular sheet of paper is 8: 5. If the width of
sheet is 17.5 cm, find its length.
Let length = x cm 8:5 = X: 17-5
ages of A and B are in the ratio 6 : 5. If A's age is 18 years, find the age of B.
um of 10,500 is divided among A, B and C in the ratio 5 : 6:4. Find the share of each.
the ratios 15 cm to 2 m and 10 sec to 3 minutes form a proportion ?
the ratios 2 kg : 80 kg and 25 g : 625 g form a proportion ?
kg sugar costs 350. If x kg sugar of the same kind costs 175, find the value of x.
10 kg : x kg = 350 : 175
10 x 175 = X X 350
10 x 175
X =
= 5
350
lengths of two ropes are in the ratio 7:5. Find the length of:
shorter rope, if the longer one is 22.5 m
(ii) longer rope, if the shorter is 9.8 m.​

Answer 1

Step-by-step explanation:

If the cost of the second article is x=7:4=2800:x

7÷4 ×2800÷x

7x=4 × 2800

x=4×2800÷7

4×400=1600