Question

please answer thi question....i have tomorrow exam..... I have answers but not explaination ...
a) rs 77 but how​

Answer 1

Answer:

I think your test is going on

Step-by-step explanation:

don't cheat.........

it's a bad habit

Answer 2

Answer:

no your answer is wrong.

a)CSA of hemisphere = 2πr^2

=2×22/7×3.5×3.5

=22×35/10

=770/10

= 77cm^2

Cost of painting =77 ×50

=3850 rs

b)cost of painting the top=TSA of cube -area of circle

=6a^2 -πr^2

=(6×10×10) - (22/7×3.5×3.5)

=600-38.5

=561.5cm^2

cost of painting =561.5×10

=5615rs

c) TSA of block =tsa of cube + csa of hemisphere - area of circle

=6a^2 + 2πr^2 - πr^2 [2πr^2-πr^2 =πr^2(2-1)=

=6×10×10 +πr^2 πr^2(1)=πr^2]

=600 ×22/7×3.5×3.5

=561.5cm^2