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Let length = 2, breadth = 3 & Height of room = 4 So original total area of four walls = 2(2 x 4 + 3 x 4) = 2(8 + 12) = 2 x 20 = 40 Then new length = 4, new breadth = 1.5 and new height = 2 So new total area of four walls = 2(4 x 2 + 1.5 x 2) = 2(8 + 3) = 2 x 11 = 22 ; Hence decrease in total area of four walls = (40 - 22)/40 x 100 = 45%
In what ratio rice at 34 Rs/kg should be mixed with the rice at 27 Rs/kg so that selling mixture at Rs 39 per kg gives the profit of 30% if the quantity...
A man sold one shirt and one t-shirt for Rs. 4000 on shirt he gained 21% and he lost 14% on t-shirt. If overall profit is 7%, then cost price of t-shirt is
One type of liquid contains 15% of benzene, the other contains 20% of benzene. A can is filled with 6 parts of the first liquid and 4 parts of the secon...
‘D’ and ‘E’ can complete a project in 40 days, while ‘E’ and ‘F’ can complete it in 60 days. ‘D’ and ‘E’ worked together on it f...
The Jar contains only 8 litres of milk and the rest is water. A new mixture in which concentration of milk is 30%, is to be formed by replacing the Jar ...
Cost of two types of pulses is Rs.11 and Rs, 16 per kg, respectively. If both the pulses are mixed together in the ratio 2:3, then what should be the pr...
(141.95 – 112.06) × (45.21 – 38.99) = ?
Neha spends 80% of her monthly income. Next month, her income increased by 20% while her expenditure increased by 15%. Due to this, her monthly savings ...
A shopkeeper has 60 kg rice a part of it, he sells at the profit of 30% and rest at loss of 10% and he get the loss of 8% so what is the quantity sold a...
