Question
Four friends, A, B, C, and D, went out for lunch. A paid
40% of the total bill. From the remaining amount, B paid 40%. Of what was left, C paid 50%. D paid the final Rs. 936. Calculate the difference (in Rs.) between the amounts paid by B and D.Solution
Let the total bill be 100x A paid = 40x B paid = 40% of the remaining = 40% of 60x = 24x C paid = 50% of remaining = 50% of 36x = 18x Now, 40x+24x+18x+936 = 100x 18x = 936 x = 52 difference between the amount paid by B and D = 24x – 936 = 24×52 – 936 = 312
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