Question

17. If the weight of a ten rupee coin 15g,then tick the correct of the following number of coins:
g
(d) If the weight of 20 coins of 10 rupees is same as the
weight of 30 coins of 5 rupees, find the weight of a five rupees coin.

(1) 10g (2) 14g

(3) 16g (4) 18g


With formula​

Answer 1

Answer:

let y weight of 5 rupees

Step-by-step explanation:

30coin of 5rupees × y = 20coin of 10rupees × 15g

30×y=20×15

$y = \frac{20 \times 15}{30} \\ y = \frac{2 \times 15}{3} \\ y = 2 \times 5 \\ y = 10grams$

1). 10 gram is correct