Question

Q. 7) The radius of a circular lid of water tank is 0.7 m. How much will it cost to paint,
both sides of 150 such lids at the rate of 25 per sq. m ?
1) 5775 2) 11550 3) 10500 4)
11500​

Answer 1

Answer:

given

r=0.7m

lids=150

per lid cost =25per sq.m

perimeter of circle=2πr

2π×0.7

=2×22÷7×0.7

=4.4m

for 150 such lid=

4.4×150=660m

25 rs per lid

then for 150 lid =660×25=11550