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A sports teacher has to spend Rs. 1300 when he purchases 10 footballs and 20 Hockey sticks from a shop. However, if he purchases 15 footballs and 15 hockey sticks, the amount spent is Rs. 1350. The cost of one football is

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answer is A.

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Detailed Solution

Cost of football

= x

Cost of hockey stick $= y$

$10 x + 20 y = 1300 \Rightarrow x + 2 y = 130 \to (1)$

$15 x + 15 y = 1350 \Rightarrow x + y = 90 \to (2)$

Solve (1) and (2), $y = 40$

$x = 50$ .

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