Question

In an alloy, ratio of copper and zinc is 7:2, If bell of weight 45 kg is made from this alloy, what quentity of copper will be used?

(a) 35 kg (b) 20 kg

(C) 15 kg (d) 10 kg

Answer 1

Answer:

35 kg

Step-by-step explanation:

let copper be 7x

zinc will be 2x

Total weight = 45 kg

7x + 2x = 45

9x = 45

x = 45/9

x = 5

so copper weight will be 7×5 = 35 kg

Answer 2

7/9*45 is equal to 35kg