Question

They cost of painting a cubical box of side 3cm at the rate of RS.10 per sq.m is

Answer 1

Answer:

Rs 0.054 (if question is printed correctly and rate of painting is Rs 10 per sq.m)

Rs 540 (if question is printed incorrectly and rate of painting is Rs 10 per sq.cm)

Step-by-step explanation:

total surface area(tsa) of cube = 6a^2 (where a is length of the side)

tsa = 6*3*3 = 54 sq cm

rate of painting per square metre (as specified in question) = Rs 10 per sq.m

=> rate per sq.cm = 1000paise/(100 * 100)

= 0.1 paise per sq.cm

total cost = 54 * 0.1 = 5.4paise = Rs 0.054

If question is misprinted and rate is Rs. 10 per sq.cm

then total cost = Rs. 540