Advertisements
Advertisements
प्रश्न
An alloy contains only zinc and copper and they are in the ratio of 7:9. If the weight of the alloy is 8 kg, then find the weight of copper in the alloy.
उत्तर
The ratio of the weight of zinc and copper is 7:9.
Let the weight of zinc be 7 : x kg and the weight of copper be 9x kg.
The weight of the alloy = 8 kg
⇒ 7x + 9x = 8
⇒ 16x = 8
⇒ x = `8/16 = 1/2`
So, the weight of copper = `9 xx 1/2` kg = `9/2` kg
= `4 1/2` kg
APPEARS IN
संबंधित प्रश्न
If r2 = pq, show that p : q is the duplicate ratio of (p + r) : (q + r).
If r2 = pq , show that p : q is the duplicate ratio of (p+r) : ( q+r)
Express the following ratios in its simplest form :
4:6
Do the ratios 2 kg : 80 kg and 25 g : 625 g form a proportion?
Find the ratio of the first quantity to the second.
40 rupees, 120 rupees
Express the following ratio in the simplest form:
777 : 1147
Ratio of 75 paise to ₹ 2 = _____________
Find the simplified form of the following ratio.
7 : 15
The ratio 5:4 is different from the ratio 4:5.
In figure, what is the ratio of the areas of
(a) shaded portion I to shaded portion II?
(b) shaded portion II to shaded portion III?
(c) shaded portions I and II taken together and shaded portion III?
