(i) Suresh has a recurring deposit account in a bank. He deposits Rs 2000 per month and the [3 bank pays interest at the rate of 8% per annum. If he gets Rs 1040 as interest at the time of maturity, find in years total time for which the account was held.

(ii) The following table gives the duration of movies in minutes.

Using step - deviation method, find the mean duration of the movies.

(iii) If
(a) Find (a+b)/(a-b)
(b) Hence using properties of proportion, find a: b,

Solution

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