यदि रैखिक समीकरण युग्म2x + 3y = 72ax + (a + b)y = 28 के अनंत हल (infinitely many solutions) हैं, तो a और b के बीच निम्नलिखित में से कौन-सा संबंध सही है?

Find the number of solutions for the pair of linear equations: 5x − 7y + 28 = 0 and 10x + 14y − 28 = 0.

If 2p3 - 57 = 3, then the value of p is:

The cost of 2 sarees and 4 shirts is Rs. 1600. With the same amount of money, one can buy 1 saree and 6 shirts. If someone wants to buy 12 shirts, how much amount does he/she have to pay?