Question

45 packets of butter each weighing 100 gm cost Rs.607.50. Wht will be the cost of 18 packets of butter each weigh-in 500 gm?

Answer 1

Find the weight of the 45 packets:

1 packet = 100g

45packets = 100 x 45 = 4500 g

Find the cost of 1g:

4500 g = Rs 607.50

1 g = Rs 0.135

Find the cost of 1 pack of 500 g:

1 g = Rs 0.135

500g = 0.135 x 500 = Rs 67.50

Find the cost of 18 packets:

1 packet = Rs 67.50

18 packets = 67.50 x 18 = Rs 1215

Answer: 18 packets of 500g cost Rs 1215

Answer 2

finding the weight of butter of 48 packets -

if each packet = 100 g

45 packet = 45x100 = 4500 g

finding the cost of each gram --

if 4500 g = 607.50 rupees

1 g = 607.50 ÷ 4500 = 0.135 rs

finding the cost of 500g weigh packet

if 1 g = 0.135 rs

500 g = 500x0.135 = 67.5 rs

finding the cost of 18 packets --

if 1 packet = 67.5 rs

18 packets = 18x67.5 = 1215.

hence the cost of 18 packets of butter each weigh in 500g butter is 1215 rupees

hope it helps you..