Question

A rectangular field of dimensions 20 m x 40 m needs to be ploughed. The cost of ploughing is ₹ 2 per ${cm}^2$. Find the total cost of ploughing the rectangular field.

• A. ₹ 1,60, 00,000
• B. ₹ 1,90, 00,000
• C. ₹ 16,000
• D. ₹ 80, 00,000

Answer 1

The correct option is A ₹ 1,60, 00,000

Given,
Length of the rectangle = 40 m
Breadth of the rectangle = 20 m
Cost of ploughing = ₹ 2 per ${cm}^2$

Area of the rectangular field
= length x breadth
= 40 m x 20 m
= 800 $m^2$

Converting it into ${cm}^2$
1 $m^2$ = 10,000 ${cm}^2$
800 $m^2$ = 800 x 10,000 ${cm}^2$
= 80,00,000 ${cm}^2$

$\therefore$Total cost of ploughing
= 80,00,000 ${cm}^2$ x ₹ 2/${cm}^2$
= ₹ 1,60, 00,000