Question

what is the answer of a lawn is 80m long and 60m wide. there is a swimming pool of length 20mÃ6m is this lawn . what will be the cost of putting grass in the remaining part of the field at rs 30 per square meter?

Answer 1

$area \: of \: lawn \: = l \times b \\ = 80 \times 60 \\ = 4800 {m}^{2} \\ area \: of \: swimming \: pool = l \times b \\ = 20 \times 6 \\ = 120 {m}^{2} \\ area \: required \: = 4800 - 120 \\ = 4680 {cm}^{2} \\ price = 30 \times 4680 \\ = rs \: 140400$