If 25 metres of cloth costs Rs. 227.50, then

(i) What will be the cost of 40 metres of the same type of cloth?

(ii) What will be the length of the cloth bought for Rs 810?

From the following table, determine if x and y are in direct proportion or not.

(i)

(ii)

(iii)

If a and b vary inversely to each other, then find the values of p, q, r: x, y, z and l, m, n.

(i)

(ii)

(iii)

A swimming pool can be filled in 4 hours by 8 pumps of the same type. How many such pumps are required if the pool is to be filled in hours?

The cost of 27 kg of iron is Rs. 1,080, what will be the cost of 120 kg of iron of the same quality?