Subject :IMO Class : Class 8

Amit want to buy a rectangular field whose area is (3*a*^{2} + 5*ab* + 2*b*^{2}) sq. units. One of its sides is (*a* + *b*) units. Find the length of the fence around the field.

A (10*a* + 20*b*) units

B (4*a* + 3*b*) units

C (2*a* + 2*b*) units

D (8*a* + 6*b*) units

explanation