Question

(1) The cost of 70 envelopes is Rs. 630. Find the cost of 23 envelopes. How many
such envelopes can be bought for Rs. 900 and how much money would be left?
(ii) An express train travels 438 km in 6 hours. How long would a 1387 km trip take?​

Answer 1

Explanation:

cost of 23 envelopes is 207 rupees as cost of 70 envelopes is 630 rupees then  each envelope costs 9 rupees for 900 rupees 100 envelopes are bought and no money is left