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| 1. |
anurag buys coffee and tea at 37.5 and 35.0 rupees per kg, respectively; he spends 870 rupees and gets 24 kg in all , how much of each kind did he buy? |
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Answer» let Amount of coffee he buy = x kgand that of tea = y kgx + y = 24 (given) x = 24 - y ... (i) cost of x kg coffee =Rs37.5xcost of y kg tea = Rs 35y37.5x + 35y = 870 (given) using (i) equation 37.5(24-y) + 35y = 870900 - 37.5y + 35y = 870-2.5y = -30y = 30/2.5y = 12 kgand x = 24 - 12 =12kgcoffee= 12kg and tea = 12 kg answer |
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