ANSWER : Rs 1.50

Explanation : : Let original rate be Rs x Reduced Rate =Rs.(100-20)/100 x=80/100x=4/5x 120/4x / 5-120/x=20 600-480/4x=20 4x=120/20=6 x=6/4=1.50 Original Price of the orange=Rs.150

ANSWER : 66 2/3

Explanation : : If A is R% less than B,then B is more than A by {R/100-R x 100}% Required Percentage=40/100-40 x 100=40/60 x 100=66 2/3 %

ANSWER : 4/5

Explanation : : Rectangle length=100 cm Rectangle length=100 cm Area=lxb=100x100=1000 cm² Now,length is 5% excess, the new length=100+5/100 x 100=105 cm Now breadth is 4% less the new breadth=100-4/100 x 100=96 cm Area=lxb=105x96=10080 cm² Increased area=10080-10000=80 cm² Percentage of increased area=80/10000 x 100=4/5%

ANSWER : 37.5

Explanation : : The using formula =(x±y± X x Y/100)% x=+25% y=+10% =25+10+25x10/100=35+2.5=37.5%

ANSWER : 80 litres

Explanation : : Total mixture =100 litres 10% of water means =10/100 x 100=10 litres of water 100-10=90 litres of milk According to this question, 90/10+W=1(50% means 1:1) 90=10+W Water=90-10=80 litres