Question

Ramesh went to the market to buy potatoes he found the shopkeeper selling 2 whole 1 by 2 kg potatoes for 30 rupees Ramesh power 15 kg potatoes from him and gave the shopkeeper 500 note shopkeeper gave backup balance of 352 Ramesh one way back home he realise that the shopkeeper had given in him more money Ramesh went back to the shopkeeper and return the extra money
(a) what was the cost of 15 kg potatoes.
(b) how much money did Ramesh return to the shopkeeper ​

Answer 1

Answer:

(a) 2kg-30

so, 15kg=15 ×30 =450

... cost of 15 kg potatoes =450

(b) Ramesh returned = 450-352

= 98

..Ramesh returned 98 for the shopkeeper

Answer 2

Concept:

The unitary method is a method for determining the value of a single unit from the value of many units and multiple units from the value of a single unit.

Given:

The cost of $2\frac{1}{2}$ kg potatoes$= Rs. 30$

The amount of money the shopkeeper returned$=Rs. 352$

Find:

(a) What was the cost of 15 kg of potatoes?

(b) How much money did Ramesh return to the shopkeeper?

Solution:

(a) The cost of $2\frac{1}{2}or \frac{5}{2}$  kg potatoes$= Rs. 30$

The cost of 1 kg potatoes $= \frac{30*2}{5}=Rs.12$

∴ The cost of 15 kg potatoes $=15*12=Rs.180$

Hence the cost of 15 kg potatoes is $Rs. 180$

(b) The amount of money Ramesh gave to the shopkeeper $=Rs.500$

Actual amount of money the shopkeeper should return $=500-180=Rs.320$

But the shopkeeper returned = $Rs. 352$

∴ The amount of money Ramesh should return $=352-320=Rs.32$

Hence Ramesh should return $Rs. 32$ ​to the shopkeeper.