Question

A blackboard is 27 dm 7cm long and
21 dm 5 cm broad. What will be the cost of
painting it at the rate of 75 paise per square
centimetre?​

Answer 1

Answer:

The cost of painting the blackboard is Rs. 44,666.25

Step-by-step explanation:

The length of the blackboard is given=27 dm and 7cm=(270+7)cm=277cm

The breadth of the blackboard is given=21 dm and 5cm=(210+5)cm=215cm

To paint the blackboard we need to paint the entire area of the blackboard,

the formula for the area of the blackboard is given by=length x breadth=(277x215)$cm^{2}$=59555$cm^{2}$

It is given that the cost of painting the blackboard is 75 paise per square centimetre

The cost of painting the blackboard will be=(59555 x 75)paisa=4466625 paisa=Rs 44,666.25