The cost of 40 packets of 12 pens each is Rs 1680. The cost of 30 packets each containing 9 such pens is _____________
(A) Rs 1260
(B) Rs 945
(C) Rs 1080
(D) Rs 1560
how?
The cost of 40 packets of 12 pens each is Rs 1680. The cost of 30 packets each containing 9 such pens is _____________
(A) Rs 1260
(B) Rs 945
(C) Rs 1080
(D) Rs 1560
how?