The compound interest on the sum of money at 8% p. a. for 2 yrs is more than the simple interest on the same sum at the same rate for the same time by Rs 72.80. find the sum.

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During your cycling trip, you and your friends often stayed in hostels. the prices of these are listed below. hostel standard room (price per night) with breakfast (price per night) super sleep hostels £22.45 £28.65 normandy nights £18.55 £25 zzzola hostels £24.50 £30.99 belgian beds £11.20 £18.55 night-time rest days ? £33 what is the range in cost for a single night, including both standard room prices and with breakfast prices?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?